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Simplifying x + 0.20(7) = 0.40(x + 7) Multiply 0.20 * 7 x + 1.4 = 0.40(x + 7) Reorder the terms: 1.4 + x = 0.40(x + 7) Reorder the terms: 1.4 + x = 0.40(7 + x) 1.4 + x = (7 * 0.40 + x * 0.40) 1.4 + x = (2.8 + 0.40x) Solving 1.4 + x = 2.8 + 0.40x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.40x' to each side of the equation. 1.4 + x + -0.40x = 2.8 + 0.40x + -0.40x Combine like terms: x + -0.40x = 0.6x 1.4 + 0.6x = 2.8 + 0.40x + -0.40x Combine like terms: 0.40x + -0.40x = 0.00 1.4 + 0.6x = 2.8 + 0.00 1.4 + 0.6x = 2.8 Add '-1.4' to each side of the equation. 1.4 + -1.4 + 0.6x = 2.8 + -1.4 Combine like terms: 1.4 + -1.4 = 0.0 0.0 + 0.6x = 2.8 + -1.4 0.6x = 2.8 + -1.4 Combine like terms: 2.8 + -1.4 = 1.4 0.6x = 1.4 Divide each side by '0.6'. x = 2.333333333 Simplifying x = 2.333333333
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