Question

Solve the equation

-(x - 10)=7

Answer 1

Solve for x:
10-x = 7
Isolate terms with x to the left hand side.
Subtract 10 from both sides:
(10-10)-x = 7-10
Look for two terms that sum to zero.
10-10 = 0:
-x = 7-10
Evaluate 7-10.
7-10 = -3:
-x = -3
Multiply both sides by a constant to simplify the equation.
Multiply both sides of -x = -3 by -1:
-x/(-1) = 3
Any non zero number divided by itself is one.
(-1)/(-1) = 1:
Answer: x = 3