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Simplifying -5(4x + 3) + 21x = -3 Reorder the terms: -5(3 + 4x) + 21x = -3 (3 * -5 + 4x * -5) + 21x = -3 (-15 + -20x) + 21x = -3 Combine like terms: -20x + 21x = 1x -15 + 1x = -3 Solving -15 + 1x = -3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + 1x = -3 + 15 Combine like terms: -15 + 15 = 0 0 + 1x = -3 + 15 1x = -3 + 15 Combine like terms: -3 + 15 = 12 1x = 12 Divide each side by '1'. x = 12 Simplifying x = 12
| 7-5x^2+8= | | 5x*2=7*2x | | 200-x=300 | | 13x*4=5x | | 0.5(x+3)=0.8(10-x) | | 3j+6-j=2(j+1) | | 28+9m=2n | | 5x/3=2x | | 37x-51=37x+51 | | 0.2/56.78 | | ln(x)+ln(4)=2ln(x) | | 3x/2=10x/5 | | ln(15x)=ln(x^2+56) | | 2x*3=4x*3 | | 0.02(2t-9)=0.04(t+1)-0.22 | | 4x*3=10x | | 5+5x= | | X^3-15X^2+66X-80=0 | | 14a-3b-4a+b= | | 6x-4x+3x-y+2y= | | 0.03-0.02(x+1)=-0.01(2-x) | | 2x*4=6x | | 2(2n+4)=7(4n+5)+4 | | c(3.10)=300+0.92(3.10) | | c(x)=300+0.92x | | 3y+z=10 | | 2000+3r= | | -3-8/15+-8= | | 2x-z=8 | | 50-18x^2=0 | | 2x-3/5--4= | | -12k^2+20k+57=0 |