9514 1404 393
Answer:
x = 7
Step-by-step explanation:
Eliminate parentheses and collect terms. Then solve the resulting 3-step linear equation.
x -15 = 7 -5x +20
x -15 = -5x +27
6x -15 = 27 . . . . . . step 1, add 5x to put the variable term on one side
6x = 42 . . . . . . . . . step 2, add 15 to put the constant term on the other side
x = 7 . . . . . . . . . . . . step 3, divide by the coefficient of the variable
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Additional comment
The variable terms have coefficients 1 and -5. We choose to add the opposite of the term with the least coefficient (farthest left on the number line). That way, the variable term ends up with a positive coefficient.
