4(a-10)=40

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Solution for 4(a-10)=40 equation: 


Simplifying
4(a + -10) = 40

Reorder the terms:
4(-10 + a) = 40
(-10 * 4 + a * 4) = 40
(-40 + 4a) = 40

Solving
-40 + 4a = 40

Solving for variable 'a'.

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

Add '40' to each side of the equation.
-40 + 40 + 4a = 40 + 40

Combine like terms: -40 + 40 = 0
0 + 4a = 40 + 40
4a = 40 + 40

Combine like terms: 40 + 40 = 80
4a = 80

Divide each side by '4'.
a = 20

Simplifying
a = 20

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