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Simplifying (x + -3)(x + 5) = x * x + -7x + -15 Reorder the terms: (-3 + x)(x + 5) = x * x + -7x + -15 Reorder the terms: (-3 + x)(5 + x) = x * x + -7x + -15 Multiply (-3 + x) * (5 + x) (-3(5 + x) + x(5 + x)) = x * x + -7x + -15 ((5 * -3 + x * -3) + x(5 + x)) = x * x + -7x + -15 ((-15 + -3x) + x(5 + x)) = x * x + -7x + -15 (-15 + -3x + (5 * x + x * x)) = x * x + -7x + -15 (-15 + -3x + (5x + x2)) = x * x + -7x + -15 Combine like terms: -3x + 5x = 2x (-15 + 2x + x2) = x * x + -7x + -15 Multiply x * x -15 + 2x + x2 = x2 + -7x + -15 Reorder the terms: -15 + 2x + x2 = -15 + -7x + x2 Add '15' to each side of the equation. -15 + 2x + 15 + x2 = -15 + -7x + 15 + x2 Reorder the terms: -15 + 15 + 2x + x2 = -15 + -7x + 15 + x2 Combine like terms: -15 + 15 = 0 0 + 2x + x2 = -15 + -7x + 15 + x2 2x + x2 = -15 + -7x + 15 + x2 Reorder the terms: 2x + x2 = -15 + 15 + -7x + x2 Combine like terms: -15 + 15 = 0 2x + x2 = 0 + -7x + x2 2x + x2 = -7x + x2 Add '-1x2' to each side of the equation. 2x + x2 + -1x2 = -7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 2x + 0 = -7x + x2 + -1x2 2x = -7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 2x = -7x + 0 2x = -7x Solving 2x = -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. 2x + 7x = -7x + 7x Combine like terms: 2x + 7x = 9x 9x = -7x + 7x Combine like terms: -7x + 7x = 0 9x = 0 Divide each side by '9'. x = 0 Simplifying x = 0
| 3x=5(4+x) | | 5(4x)-1/2x | | (x+2)(x+3)=x*x+5x+6 | | -76=6x+8 | | x-(-7-x)=35 | | 5/215 | | 9/801 | | 4/356 | | 5/340 | | 3000-120w=4000-160w | | 37=12t | | 55=(1/5)(285-10*e) | | 3*x+7=31 | | ln(5x)=2 | | 8/272 | | 3/162 | | -(3+-6)=-24 | | 17x=-8 | | 2/3x=2/7 | | 30+3x=35+1x | | 0.3(x-2)=1.2 | | 6/252 | | 27=3+8u | | 6-n=13 | | -79=-3-4b | | 5-4a=3+2a | | -5c+7-6c=-59 | | 40k^2-3k-0.3=0 | | y=.5+.7x | | -5/6/-4 | | 12000=0.8v-0.08v*6 | | 1/3p+3=15 |