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Simplifying
18x2 + -28 + 30 = 228
Reorder the terms:
-28 + 30 + 18x2 = 228
Combine like terms: -28 + 30 = 2
2 + 18x2 = 228
Solving
2 + 18x2 = 228
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-2' to each side of the equation.
2 + -2 + 18x2 = 228 + -2
Combine like terms: 2 + -2 = 0
0 + 18x2 = 228 + -2
18x2 = 228 + -2
Combine like terms: 228 + -2 = 226
18x2 = 226
Divide each side by '18'.
x2 = 12.55555556
Simplifying
x2 = 12.55555556
Take the square root of each side:
x = {-3.543381938, 3.543381938}
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