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Simplifying 3(4x + -2x) + 7 = 4x + 21 Combine like terms: 4x + -2x = 2x 3(2x) + 7 = 4x + 21 Remove parenthesis around (2x) 3 * 2x + 7 = 4x + 21 Multiply 3 * 2 6x + 7 = 4x + 21 Reorder the terms: 7 + 6x = 4x + 21 Reorder the terms: 7 + 6x = 21 + 4x Solving 7 + 6x = 21 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 7 + 6x + -4x = 21 + 4x + -4x Combine like terms: 6x + -4x = 2x 7 + 2x = 21 + 4x + -4x Combine like terms: 4x + -4x = 0 7 + 2x = 21 + 0 7 + 2x = 21 Add '-7' to each side of the equation. 7 + -7 + 2x = 21 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 21 + -7 2x = 21 + -7 Combine like terms: 21 + -7 = 14 2x = 14 Divide each side by '2'. x = 7 Simplifying x = 7
| 2x^2-5=-5 | | 8x^2-13y=0 | | 3x+5y=5740 | | 4a+3b=2b | | 6x+4y+4+15x-12y= | | .5(5-7x)=8-(4x+16) | | 4-(14+12)-24-50= | | 9x=-3y+18 | | 7-4b+4b=7 | | 2x+2(3x-2)=10 | | 13x+4x+7+5x+9=180 | | 12c^3+9c^2=0 | | 8a+5=3a-21 | | 54=x(x-3) | | (5y-2)(5+y)=0 | | 2x^2-25=7 | | x+72+x-2=180 | | 9m^2+m= | | (7x^2+68X+20)=0 | | 9/5c+32= | | 3h=-11+2h | | 4x^2-19x+21=o | | (-a-2b+5)5ab= | | 4(4x-16)=80 | | -3d-2d=-3d | | 14n^3+7n+7n^2= | | 4(7)= | | 11+3x=28 | | 4a+2c=80 | | S+(s+54)=130 | | x^4-81y^6=0 | | t-.20=.30 |