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Simplifying 3 + -3(2x + 4) = 21 Reorder the terms: 3 + -3(4 + 2x) = 21 3 + (4 * -3 + 2x * -3) = 21 3 + (-12 + -6x) = 21 Combine like terms: 3 + -12 = -9 -9 + -6x = 21 Solving -9 + -6x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -6x = 21 + 9 Combine like terms: -9 + 9 = 0 0 + -6x = 21 + 9 -6x = 21 + 9 Combine like terms: 21 + 9 = 30 -6x = 30 Divide each side by '-6'. x = -5 Simplifying x = -5
| 9(w^2+1)=-9 | | x^2+22x+837=0 | | Y+9=-12-y+3 | | -2(m+l)=10 | | 3a-5+2a= | | 2(5a-13)=6(-2a+3) | | -16x^2+15x+12=0 | | 199200(2/x)=150x | | 3x+5+x=-1-2x | | -4.3x-2.2x=13 | | Y=10+0.89*100 | | 22x(45+32)56=1000 | | 0.5+0.5x-1.7x=-0.46 | | 0.5+0.5-1.7x=-0.46 | | 1/2x+3=x-4 | | 40=5(10+a) | | 0.99*100=y | | log(6)(13-x)=1 | | 80=-80 | | 6(t+7)=90 | | x^2+y^2+5x-7y+16=0 | | -y+3=3y+8 | | lg*4*x=2 | | 38x-12= | | 7x-11-x=19 | | 6t+7=90 | | 8x^2-13-6=0 | | 5r+2=3x+14 | | 40=5(a+10) | | 45x-18= | | -3(-5)=24 | | 2(x+5)=120 |