99=-3(7-5a)

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Solution for 99=-3(7-5a) equation:


Simplifying
99 = -3(7 + -5a)
99 = (7 * -3 + -5a * -3)
99 = (-21 + 15a)

Solving
99 = -21 + 15a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-15a' to each side of the equation.
99 + -15a = -21 + 15a + -15a

Combine like terms: 15a + -15a = 0
99 + -15a = -21 + 0
99 + -15a = -21

Add '-99' to each side of the equation.
99 + -99 + -15a = -21 + -99

Combine like terms: 99 + -99 = 0
0 + -15a = -21 + -99
-15a = -21 + -99

Combine like terms: -21 + -99 = -120
-15a = -120

Divide each side by '-15'.
a = 8

Simplifying
a = 8

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