3(X-7)-4(y+9)=40

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Solution for 3(X-7)-4(y+9)=40 equation: 


Simplifying
3(X + -7) + -4(y + 9) = 40

Reorder the terms:
3(-7 + X) + -4(y + 9) = 40
(-7 * 3 + X * 3) + -4(y + 9) = 40
(-21 + 3X) + -4(y + 9) = 40

Reorder the terms:
-21 + 3X + -4(9 + y) = 40
-21 + 3X + (9 * -4 + y * -4) = 40
-21 + 3X + (-36 + -4y) = 40

Reorder the terms:
-21 + -36 + 3X + -4y = 40

Combine like terms: -21 + -36 = -57
-57 + 3X + -4y = 40

Solving
-57 + 3X + -4y = 40

Solving for variable 'X'.

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

Add '57' to each side of the equation.
-57 + 3X + 57 + -4y = 40 + 57

Reorder the terms:
-57 + 57 + 3X + -4y = 40 + 57

Combine like terms: -57 + 57 = 0
0 + 3X + -4y = 40 + 57
3X + -4y = 40 + 57

Combine like terms: 40 + 57 = 97
3X + -4y = 97

Add '4y' to each side of the equation.
3X + -4y + 4y = 97 + 4y

Combine like terms: -4y + 4y = 0
3X + 0 = 97 + 4y
3X = 97 + 4y

Divide each side by '3'.
X = 32.33333333 + 1.333333333y

Simplifying
X = 32.33333333 + 1.333333333y

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