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Simplifying 7x + 21 = 9x + 3 Reorder the terms: 21 + 7x = 9x + 3 Reorder the terms: 21 + 7x = 3 + 9x Solving 21 + 7x = 3 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 21 + 7x + -9x = 3 + 9x + -9x Combine like terms: 7x + -9x = -2x 21 + -2x = 3 + 9x + -9x Combine like terms: 9x + -9x = 0 21 + -2x = 3 + 0 21 + -2x = 3 Add '-21' to each side of the equation. 21 + -21 + -2x = 3 + -21 Combine like terms: 21 + -21 = 0 0 + -2x = 3 + -21 -2x = 3 + -21 Combine like terms: 3 + -21 = -18 -2x = -18 Divide each side by '-2'. x = 9 Simplifying x = 9
| Ln(x+2)=1 | | 0.85x+0.05(14-x)=0.10(-25) | | 12+2(x-4)=20-2x | | (67.38+-3.63y+-3.44z)(280.79)+1020.12y+966.52z=18920.62 | | 3u^2+2=-5 | | 7x-8=87 | | 6(4y+2)-9=-3 | | 3b-(-4b)= | | x^2=-19 | | 12y+15x=292.50 | | -3y-3=1-2y | | 2(t-3)+9=-7 | | 280.79x+1020.12y+966.52z=18920.62 | | M-5=3(M-5) | | 3x+1=7x-3 | | M-5=3M-5 | | (-12+-8x+x^2)=0 | | -5(3a-6)=0 | | 4+4(x+5)=40 | | -3/x=7 | | 50=-2x+10y | | 3x^2-24x-36=0 | | -3(4y-4)=-24 | | 4x+5p=18 | | 9x+15y=87 | | 2y^2+5y-18= | | 16=a/3 | | -75=5(4x+5) | | 21z^2+19z-2= | | s/-4-3=13 | | 15y=87-9x | | 2(2a-2)=4 |