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Simplifying -7(3 + x) = 4(2x + 6) (3 * -7 + x * -7) = 4(2x + 6) (-21 + -7x) = 4(2x + 6) Reorder the terms: -21 + -7x = 4(6 + 2x) -21 + -7x = (6 * 4 + 2x * 4) -21 + -7x = (24 + 8x) Solving -21 + -7x = 24 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. -21 + -7x + -8x = 24 + 8x + -8x Combine like terms: -7x + -8x = -15x -21 + -15x = 24 + 8x + -8x Combine like terms: 8x + -8x = 0 -21 + -15x = 24 + 0 -21 + -15x = 24 Add '21' to each side of the equation. -21 + 21 + -15x = 24 + 21 Combine like terms: -21 + 21 = 0 0 + -15x = 24 + 21 -15x = 24 + 21 Combine like terms: 24 + 21 = 45 -15x = 45 Divide each side by '-15'. x = -3 Simplifying x = -3
| 12x-6+4(3x)=90 | | 5(x-5)+18=138 | | -7n+10=2n | | -5(-5a+6)+6=76 | | -5.2u-4.5=-6.1u-6.3 | | (X-8)/6=7 | | f(x)=2x^3+6x^2-18x-5 | | 5(2x+10)=60 | | -6x+15=2x-1 | | 99=100-y | | 4.7-w=1.2 | | 2+6x=4x-10 | | 5x-10=-7x | | 1.8g=-9.2 | | 15+5(3+4)= | | -19x-12=-145 | | -8(m+2)=-(6+6m) | | 4y^3+12y= | | 7-6x-x^2=0 | | 3(4k+2)-17k+9+3= | | x+1.8=35 | | 2(x+6)=8x+8-6x+14 | | 4(x-2)+5x=-4(x+2)+13x | | -3(3+6v)-5(6-2v)=7v+8+v-3 | | 5x^3-10x^2-x+2=0 | | .20x+5=19-.50x | | 2/100=b/-200 | | -5(1-3x)=85 | | 8x+5x-7=45 | | x/9=15/2 | | 1+3-(2*1+1)= | | 1.7a=a |