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Simplifying
0.75 + 7x2 = 9
Solving
0.75 + 7x2 = 9
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-0.75' to each side of the equation.
0.75 + -0.75 + 7x2 = 9 + -0.75
Combine like terms: 0.75 + -0.75 = 0.00
0.00 + 7x2 = 9 + -0.75
7x2 = 9 + -0.75
Combine like terms: 9 + -0.75 = 8.25
7x2 = 8.25
Divide each side by '7'.
x2 = 1.178571429
Simplifying
x2 = 1.178571429
Take the square root of each side:
x = {-1.085620297, 1.085620297}
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