(7x+8y-3)-(9x+8y-4)=

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Solution for (7x+8y-3)-(9x+8y-4)= equation:


Simplifying
(7x + 8y + -3) + -1(9x + 8y + -4) = 0

Reorder the terms:
(-3 + 7x + 8y) + -1(9x + 8y + -4) = 0

Remove parenthesis around (-3 + 7x + 8y)
-3 + 7x + 8y + -1(9x + 8y + -4) = 0

Reorder the terms:
-3 + 7x + 8y + -1(-4 + 9x + 8y) = 0
-3 + 7x + 8y + (-4 * -1 + 9x * -1 + 8y * -1) = 0
-3 + 7x + 8y + (4 + -9x + -8y) = 0

Reorder the terms:
-3 + 4 + 7x + -9x + 8y + -8y = 0

Combine like terms: -3 + 4 = 1
1 + 7x + -9x + 8y + -8y = 0

Combine like terms: 7x + -9x = -2x
1 + -2x + 8y + -8y = 0

Combine like terms: 8y + -8y = 0
1 + -2x + 0 = 0
1 + -2x = 0

Solving
1 + -2x = 0

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + -2x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2x = 0 + -1
-2x = 0 + -1

Combine like terms: 0 + -1 = -1
-2x = -1

Divide each side by '-2'.
x = 0.5

Simplifying
x = 0.5

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