3y-1+4y-7=90

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Solution for 3y-1+4y-7=90 equation: 


Simplifying
3y + -1 + 4y + -7 = 90

Reorder the terms:
-1 + -7 + 3y + 4y = 90

Combine like terms: -1 + -7 = -8
-8 + 3y + 4y = 90

Combine like terms: 3y + 4y = 7y
-8 + 7y = 90

Solving
-8 + 7y = 90

Solving for variable 'y'.

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

Add '8' to each side of the equation.
-8 + 8 + 7y = 90 + 8

Combine like terms: -8 + 8 = 0
0 + 7y = 90 + 8
7y = 90 + 8

Combine like terms: 90 + 8 = 98
7y = 98

Divide each side by '7'.
y = 14

Simplifying
y = 14

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