-53=7(a-3)-2(7a+2)

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Solution for -53=7(a-3)-2(7a+2) equation:


Simplifying
-53 = 7(a + -3) + -2(7a + 2)

Reorder the terms:
-53 = 7(-3 + a) + -2(7a + 2)
-53 = (-3 * 7 + a * 7) + -2(7a + 2)
-53 = (-21 + 7a) + -2(7a + 2)

Reorder the terms:
-53 = -21 + 7a + -2(2 + 7a)
-53 = -21 + 7a + (2 * -2 + 7a * -2)
-53 = -21 + 7a + (-4 + -14a)

Reorder the terms:
-53 = -21 + -4 + 7a + -14a

Combine like terms: -21 + -4 = -25
-53 = -25 + 7a + -14a

Combine like terms: 7a + -14a = -7a
-53 = -25 + -7a

Solving
-53 = -25 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
-53 + 7a = -25 + -7a + 7a

Combine like terms: -7a + 7a = 0
-53 + 7a = -25 + 0
-53 + 7a = -25

Add '53' to each side of the equation.
-53 + 53 + 7a = -25 + 53

Combine like terms: -53 + 53 = 0
0 + 7a = -25 + 53
7a = -25 + 53

Combine like terms: -25 + 53 = 28
7a = 28

Divide each side by '7'.
a = 4

Simplifying
a = 4

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