4+[5(7-x)9]=-1

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Solution for 4+[5(7-x)9]=-1 equation:


Simplifying
4 + [5(7 + -1x) * 9] = -1

Reorder the terms for easier multiplication:
4 + [5 * 9(7 + -1x)] = -1

Multiply 5 * 9
4 + [45(7 + -1x)] = -1
4 + [(7 * 45 + -1x * 45)] = -1
4 + [(315 + -45x)] = -1
4 + [315 + -45x] = -1

Remove brackets around [315 + -45x]
4 + 315 + -45x = -1

Combine like terms: 4 + 315 = 319
319 + -45x = -1

Solving
319 + -45x = -1

Solving for variable 'x'.

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

Add '-319' to each side of the equation.
319 + -319 + -45x = -1 + -319

Combine like terms: 319 + -319 = 0
0 + -45x = -1 + -319
-45x = -1 + -319

Combine like terms: -1 + -319 = -320
-45x = -320

Divide each side by '-45'.
x = 7.111111111

Simplifying
x = 7.111111111

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