7(a-2)-4(a+7)=177

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Solution for 7(a-2)-4(a+7)=177 equation:


Simplifying
7(a + -2) + -4(a + 7) = 177

Reorder the terms:
7(-2 + a) + -4(a + 7) = 177
(-2 * 7 + a * 7) + -4(a + 7) = 177
(-14 + 7a) + -4(a + 7) = 177

Reorder the terms:
-14 + 7a + -4(7 + a) = 177
-14 + 7a + (7 * -4 + a * -4) = 177
-14 + 7a + (-28 + -4a) = 177

Reorder the terms:
-14 + -28 + 7a + -4a = 177

Combine like terms: -14 + -28 = -42
-42 + 7a + -4a = 177

Combine like terms: 7a + -4a = 3a
-42 + 3a = 177

Solving
-42 + 3a = 177

Solving for variable 'a'.

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

Add '42' to each side of the equation.
-42 + 42 + 3a = 177 + 42

Combine like terms: -42 + 42 = 0
0 + 3a = 177 + 42
3a = 177 + 42

Combine like terms: 177 + 42 = 219
3a = 219

Divide each side by '3'.
a = 73

Simplifying
a = 73

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