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Simplifying 2x + 3x + -4 = 21 Reorder the terms: -4 + 2x + 3x = 21 Combine like terms: 2x + 3x = 5x -4 + 5x = 21 Solving -4 + 5x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 5x = 21 + 4 Combine like terms: -4 + 4 = 0 0 + 5x = 21 + 4 5x = 21 + 4 Combine like terms: 21 + 4 = 25 5x = 25 Divide each side by '5'. x = 5 Simplifying x = 5
| 1.3-5r=7.5 | | 10km=xmiles | | 31.75=6.75+1.25r | | sin(t)=1.2 | | 7x-6y=48 | | x^2+3x+21=4x^2+12x+27 | | 10m=xmiles | | 5x^2+110x=0 | | -2(y+3)=5y | | 167=1.8c+32 | | 74-13x=5 | | 5y+6x=10 | | 2x+7=4+7 | | 219-39= | | 6c+4+c=24 | | 373=3k^3-k+3 | | 548+29.5u=2023 | | 12-(x+3)= | | -3(2+2x)=30 | | 2x-255+x=180 | | 4n-10=2n | | 14n=126 | | 6-2*(-6)-8= | | 2x-1+7x+3=19 | | -10x-3y=32 | | 5x^2+5x=2x^2-11x+35factored | | 9t=64 | | .66x-.33=1 | | 8.5d+55=55 | | 1x+4(20)=3(x+20) | | 2(-3x+1)-5(2x-3)=2 | | 5x+30=175 |