3a+5(a+b)=7

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Solution for 3a+5(a+b)=7 equation: 


Simplifying
3a + 5(a + b) = 7
3a + (a * 5 + b * 5) = 7
3a + (5a + 5b) = 7

Combine like terms: 3a + 5a = 8a
8a + 5b = 7

Solving
8a + 5b = 7

Solving for variable 'a'.

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

Add '-5b' to each side of the equation.
8a + 5b + -5b = 7 + -5b

Combine like terms: 5b + -5b = 0
8a + 0 = 7 + -5b
8a = 7 + -5b

Divide each side by '8'.
a = 0.875 + -0.625b

Simplifying
a = 0.875 + -0.625b

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