9y+4+21y=7-3(1-10y)

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Solution for 9y+4+21y=7-3(1-10y) equation: 


Simplifying
9y + 4 + 21y = 7 + -3(1 + -10y)

Reorder the terms:
4 + 9y + 21y = 7 + -3(1 + -10y)

Combine like terms: 9y + 21y = 30y
4 + 30y = 7 + -3(1 + -10y)
4 + 30y = 7 + (1 * -3 + -10y * -3)
4 + 30y = 7 + (-3 + 30y)

Combine like terms: 7 + -3 = 4
4 + 30y = 4 + 30y

Add '-4' to each side of the equation.
4 + -4 + 30y = 4 + -4 + 30y

Combine like terms: 4 + -4 = 0
0 + 30y = 4 + -4 + 30y
30y = 4 + -4 + 30y

Combine like terms: 4 + -4 = 0
30y = 0 + 30y
30y = 30y

Add '-30y' to each side of the equation.
30y + -30y = 30y + -30y

Combine like terms: 30y + -30y = 0
0 = 30y + -30y

Combine like terms: 30y + -30y = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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