# Solving linear systems by elimination

When Solving linear systems by elimination, there are often multiple ways to approach it. Math can be a challenging subject for many students.

## Solve linear systems by elimination

There are a lot of great apps out there to help students with their school work for Solving linear systems by elimination. In solving equations or systems of equations, substitution is often used as an effective method. Substitution involves solving for one variable in terms of the others; once a variable is isolated, the equation can be solved more easily. In general, substitution is best used when one equation in a system is much simpler than the others. However, it can also be useful in other cases where equations are not easily solved by other methods. To use substitution, one must first identify which variable will be solved for. The other variable(s) are then substituted into this equation. From there, the equation can be simplified and solved for the desired variable. Substitution can be a powerful tool in solving equations; however, it is important to ensure that all resulting equations are still consistent and have a single solution. Otherwise, the original problem may not have had a unique solution to begin with.

Algebra can be a helpful tool for solving real-world problems. In many cases, algebraic equations can be used to model real-world situations. Once these equations are set up, they can be solved to find a solution that meets the given constraints. This process can be particularly useful when solving word problems. By taking the time to carefully read the problem and identify the relevant information, it is often possible to set up an equation that can be solved to find the desired answer. In some cases, multiple equations may need to be written and solved simultaneously. However, with a little practice, solving word problems using algebra can be a straightforward process.

In this case, we are looking for the distance travelled by the second train when it overtakes the first. We can rearrange the formula to solve for T: T = D/R. We know that the second train is travelling at 70 mph, so R = 70. We also know that the distance between the two trains when they meet will be the same as the distance travelled by the first train in one hour, which we can calculate by multiplying 60 by 1 hour (60 x 1 = 60). So, plugging these values into our equation gives us: T = 60/70. This simplifies to 0.857 hours, or 51.4 minutes. So, after 51 minutes of travel, the second train will overtake the first.

First, it is important to read the problem carefully and identify the key information. Second, students should consider what type of operation they need to use to solve the problem. Third, they should work through the problem step-by-step, using each piece of information only once. By following these steps, students will be better prepared to tackle even the most challenging math problems.

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