3a+4b=7(a+b)

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Solution for 3a+4b=7(a+b) equation:


Simplifying
3a + 4b = 7(a + b)
3a + 4b = (a * 7 + b * 7)
3a + 4b = (7a + 7b)

Solving
3a + 4b = 7a + 7b

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.
3a + -7a + 4b = 7a + -7a + 7b

Combine like terms: 3a + -7a = -4a
-4a + 4b = 7a + -7a + 7b

Combine like terms: 7a + -7a = 0
-4a + 4b = 0 + 7b
-4a + 4b = 7b

Add '-4b' to each side of the equation.
-4a + 4b + -4b = 7b + -4b

Combine like terms: 4b + -4b = 0
-4a + 0 = 7b + -4b
-4a = 7b + -4b

Combine like terms: 7b + -4b = 3b
-4a = 3b

Divide each side by '-4'.
a = -0.75b

Simplifying
a = -0.75b

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