To check your answers in linear equations, you can use a simple method called substitution. Here’s how to do it step by step:
Solve the Equation: First, find out the value of the unknown number (we call it a variable). For example, in the equation (3x + 5 = 20), you would solve it to find (x = 5).
Substitute Back: Next, take the value you found and put it back into the original equation. Here, you replace (x) with (5):
(3(5) + 5 = 15 + 5 = 20)
Check for Equality: Finally, see if both sides of the equation are equal. If they are the same, it means your answer is correct. In this case, (20 = 20) shows that it works!
Using substitution correctly can help you solve problems more accurately. In fact, it can reduce mistakes by up to 30%!
To check your answers in linear equations, you can use a simple method called substitution. Here’s how to do it step by step:
Solve the Equation: First, find out the value of the unknown number (we call it a variable). For example, in the equation (3x + 5 = 20), you would solve it to find (x = 5).
Substitute Back: Next, take the value you found and put it back into the original equation. Here, you replace (x) with (5):
(3(5) + 5 = 15 + 5 = 20)
Check for Equality: Finally, see if both sides of the equation are equal. If they are the same, it means your answer is correct. In this case, (20 = 20) shows that it works!
Using substitution correctly can help you solve problems more accurately. In fact, it can reduce mistakes by up to 30%!