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Simplifying 2x + 7 + 3(x + 7) = 78 Reorder the terms: 2x + 7 + 3(7 + x) = 78 2x + 7 + (7 * 3 + x * 3) = 78 2x + 7 + (21 + 3x) = 78 Reorder the terms: 7 + 21 + 2x + 3x = 78 Combine like terms: 7 + 21 = 28 28 + 2x + 3x = 78 Combine like terms: 2x + 3x = 5x 28 + 5x = 78 Solving 28 + 5x = 78 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 5x = 78 + -28 Combine like terms: 28 + -28 = 0 0 + 5x = 78 + -28 5x = 78 + -28 Combine like terms: 78 + -28 = 50 5x = 50 Divide each side by '5'. x = 10 Simplifying x = 10
| x-0.3x=133 | | 6(5n-2)=14+4n | | -12=6+(3)/(4)x | | 6x+103=11x-7 | | 56-2x=16x+16 | | -5y+4(-y+9)-7(7+3y)=-7 | | -3(-6w+5)-w=3(w-6)-5 | | 5-10x=14-17x | | n+(n+1)=67 | | 2+2(2x-1)=-2(6x-3)+4x | | n+n=67 | | 5x=6x+1 | | 5x+7y=105 | | n-(n+1)=67 | | 8y-3x+2y-x= | | 3x-10y=16 | | (1+u)(5u-9)=0 | | (k+1)(k-1)=0 | | 7-p=49 | | 10(2x-1)=13(x+3) | | 2/3n=-5/6 | | 2x+7y=-42 | | n+(N+2)=67 | | V=68*58*50 | | V=68 | | -6(y+1)=2y-9+2(5y+3) | | 4y^2+7=0 | | -32t=96 | | 2.2=2z | | x/7=343 | | -2(3u-7)+4u=2(u+2) | | 3x(2x-1)(4x-5)=0 |