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Simplifying 0.1(7) + x = 0.3(7 + x) Multiply 0.1 * 7 0.7 + x = 0.3(7 + x) 0.7 + x = (7 * 0.3 + x * 0.3) 0.7 + x = (2.1 + 0.3x) Solving 0.7 + x = 2.1 + 0.3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3x' to each side of the equation. 0.7 + x + -0.3x = 2.1 + 0.3x + -0.3x Combine like terms: x + -0.3x = 0.7x 0.7 + 0.7x = 2.1 + 0.3x + -0.3x Combine like terms: 0.3x + -0.3x = 0.0 0.7 + 0.7x = 2.1 + 0.0 0.7 + 0.7x = 2.1 Add '-0.7' to each side of the equation. 0.7 + -0.7 + 0.7x = 2.1 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + 0.7x = 2.1 + -0.7 0.7x = 2.1 + -0.7 Combine like terms: 2.1 + -0.7 = 1.4 0.7x = 1.4 Divide each side by '0.7'. x = 2 Simplifying x = 2
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