45=3y+5y+7y

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Solution for 45=3y+5y+7y equation:


Simplifying
45 = 3y + 5y + 7y

Combine like terms: 3y + 5y = 8y
45 = 8y + 7y

Combine like terms: 8y + 7y = 15y
45 = 15y

Solving
45 = 15y

Solving for variable 'y'.

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

Add '-15y' to each side of the equation.
45 + -15y = 15y + -15y

Combine like terms: 15y + -15y = 0
45 + -15y = 0

Add '-45' to each side of the equation.
45 + -45 + -15y = 0 + -45

Combine like terms: 45 + -45 = 0
0 + -15y = 0 + -45
-15y = 0 + -45

Combine like terms: 0 + -45 = -45
-15y = -45

Divide each side by '-15'.
y = 3

Simplifying
y = 3

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