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(12x+17)/(3x+1) - (2x+15)/(x+7) = 3 1/5 |
Answer» <p>(12x+17)/(3x+1) - (2x+15)/(x+7) = 3 1/5 ((12x+17)(x+7) - (2x+15)(3x+1))/((x+7)(3x+1)) = 16/5 (12x*x+101x+119-6x*x-47x-15)/(3x*x+22x+7) = 16/5 5(6x*x+54x+104)=16(3x*x+22x+7) 30x*x+270x+520 = 48x*x+352x+112 18x*x+82x-408 = 0 9x*x+41x-204 = 0 9x*x - 27x + 68x - 204 = 0 9x(x-3)+68(x-3) = 0 (9x+68)(x-3) = 0 x = -68/9 or 3 </p><p> If you find this answer helpful then like it.</p> | |