91 = -7(3a - 1)

Answer 1

To solve this equation for 'a', we need to isolate the variable on one side.

Starting with the given equation: 91 = -7(3a - 1)

First, distribute -7 to the terms inside the parentheses:
91 = -21a + 7

Next, move the constant term (7) to the other side of the equation by subtracting 7 from both sides:
91 - 7 = -21a

Simplifying the left side:
84 = -21a

Finally, divide both sides by -21 to solve for 'a':
a = 84 / -21

Simplifying the right side:
a = -4

Therefore, the solution to the equation is a = -4.