7y-(10-y)=3(y-1)+4y-2.5

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Solution for 7y-(10-y)=3(y-1)+4y-2.5 equation:


Simplifying
7y + -1(10 + -1y) = 3(y + -1) + 4y + -2.5
7y + (10 * -1 + -1y * -1) = 3(y + -1) + 4y + -2.5
7y + (-10 + 1y) = 3(y + -1) + 4y + -2.5

Reorder the terms:
-10 + 7y + 1y = 3(y + -1) + 4y + -2.5

Combine like terms: 7y + 1y = 8y
-10 + 8y = 3(y + -1) + 4y + -2.5

Reorder the terms:
-10 + 8y = 3(-1 + y) + 4y + -2.5
-10 + 8y = (-1 * 3 + y * 3) + 4y + -2.5
-10 + 8y = (-3 + 3y) + 4y + -2.5

Reorder the terms:
-10 + 8y = -3 + -2.5 + 3y + 4y

Combine like terms: -3 + -2.5 = -5.5
-10 + 8y = -5.5 + 3y + 4y

Combine like terms: 3y + 4y = 7y
-10 + 8y = -5.5 + 7y

Solving
-10 + 8y = -5.5 + 7y

Solving for variable 'y'.

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

Add '-7y' to each side of the equation.
-10 + 8y + -7y = -5.5 + 7y + -7y

Combine like terms: 8y + -7y = 1y
-10 + 1y = -5.5 + 7y + -7y

Combine like terms: 7y + -7y = 0
-10 + 1y = -5.5 + 0
-10 + 1y = -5.5

Add '10' to each side of the equation.
-10 + 10 + 1y = -5.5 + 10

Combine like terms: -10 + 10 = 0
0 + 1y = -5.5 + 10
1y = -5.5 + 10

Combine like terms: -5.5 + 10 = 4.5
1y = 4.5

Divide each side by '1'.
y = 4.5

Simplifying
y = 4.5

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