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Simplifying (2x + 3)(2x + 5) + -4x2 = 15x + 13 Reorder the terms: (3 + 2x)(2x + 5) + -4x2 = 15x + 13 Reorder the terms: (3 + 2x)(5 + 2x) + -4x2 = 15x + 13 Multiply (3 + 2x) * (5 + 2x) (3(5 + 2x) + 2x * (5 + 2x)) + -4x2 = 15x + 13 ((5 * 3 + 2x * 3) + 2x * (5 + 2x)) + -4x2 = 15x + 13 ((15 + 6x) + 2x * (5 + 2x)) + -4x2 = 15x + 13 (15 + 6x + (5 * 2x + 2x * 2x)) + -4x2 = 15x + 13 (15 + 6x + (10x + 4x2)) + -4x2 = 15x + 13 Combine like terms: 6x + 10x = 16x (15 + 16x + 4x2) + -4x2 = 15x + 13 Combine like terms: 4x2 + -4x2 = 0 15 + 16x + 0 = 15x + 13 15 + 16x = 15x + 13 Reorder the terms: 15 + 16x = 13 + 15x Solving 15 + 16x = 13 + 15x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15x' to each side of the equation. 15 + 16x + -15x = 13 + 15x + -15x Combine like terms: 16x + -15x = 1x 15 + 1x = 13 + 15x + -15x Combine like terms: 15x + -15x = 0 15 + 1x = 13 + 0 15 + 1x = 13 Add '-15' to each side of the equation. 15 + -15 + 1x = 13 + -15 Combine like terms: 15 + -15 = 0 0 + 1x = 13 + -15 1x = 13 + -15 Combine like terms: 13 + -15 = -2 1x = -2 Divide each side by '1'. x = -2 Simplifying x = -2
| 11x-5=4(3x-4) | | 5(-10x-9)-9(9-3x)=-8x-9x | | x+1+4x-6=4x+2 | | x=8x-6 | | 15x-172=5x-12 | | 6-x=4(x-3)-7(x-4) | | 11=-2.2t | | 32=8y+4x | | (5a+4)(5a+4)(5a+4)= | | 6x-9=3x-24 | | x^2+4=5x+4 | | 8y+x=21 | | 17-5r=50+6r | | .625*.6=x | | 12x+12=8x-18 | | 16-2(x-4)=x-30 | | -36x^2+168x=120 | | 21=66+x | | -10=10k(k-9) | | x*2+4=5x+4 | | t+18-7=41 | | 3(x-5)=x+17 | | -x+9-x=1 | | 3(2-6m)=-15-3m-6 | | -10.3+2x=-4.9 | | 2+5m-3=34 | | 7x+2y+100=180 | | 3(2-x)+10=14.5 | | 126=2l-34+2l | | 3004-(-10007)=r | | p+7.1=2.5 | | 25(211-y)+15y=3534 |