Solve the equation and check your solution.
-7.1 + x = 12.9
A) x = 5.8
B) x = 19.5
C) x = 5.3
D) x = 20

Question

Quizplus · Accepted Answer

To solve for x, we need to isolate it on one side of the equation. Subtracting 7.1 from both sides, we get x = 5.8. To check our answer, we can substitute 5.8 for x in the original equation, which gives us 7.1 + 5.8 = 12.9, which is true. Therefore, the solution is x = 5.8. To solve the equation, isolate x by subtracting 7.1 from both sides:

7.1 + x - 7.1 = 12.9 - 7.1 
x = 5.8

To check the solution, substitute x = 5.8 back into the original equation:

7.1 + 5.8 = 12.9 
12.9 = 12.9

The equation is true, so the solution x = 5.8 is correct. Therefore, the best choice is A.

Solve the Equation and Check Your Solution