-7=-5+4(-y+9)-7(7+3x)

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Solution for -7=-5+4(-y+9)-7(7+3x) equation:


Simplifying
-7 = -5 + 4(-1y + 9) + -7(7 + 3x)

Reorder the terms:
-7 = -5 + 4(9 + -1y) + -7(7 + 3x)
-7 = -5 + (9 * 4 + -1y * 4) + -7(7 + 3x)
-7 = -5 + (36 + -4y) + -7(7 + 3x)
-7 = -5 + 36 + -4y + (7 * -7 + 3x * -7)
-7 = -5 + 36 + -4y + (-49 + -21x)

Reorder the terms:
-7 = -5 + 36 + -49 + -21x + -4y

Combine like terms: -5 + 36 = 31
-7 = 31 + -49 + -21x + -4y

Combine like terms: 31 + -49 = -18
-7 = -18 + -21x + -4y

Solving
-7 = -18 + -21x + -4y

Solving for variable 'x'.

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

Add '21x' to each side of the equation.
-7 + 21x = -18 + -21x + 21x + -4y

Combine like terms: -21x + 21x = 0
-7 + 21x = -18 + 0 + -4y
-7 + 21x = -18 + -4y

Add '7' to each side of the equation.
-7 + 7 + 21x = -18 + 7 + -4y

Combine like terms: -7 + 7 = 0
0 + 21x = -18 + 7 + -4y
21x = -18 + 7 + -4y

Combine like terms: -18 + 7 = -11
21x = -11 + -4y

Divide each side by '21'.
x = -0.5238095238 + -0.1904761905y

Simplifying
x = -0.5238095238 + -0.1904761905y

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