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Simplifying 2x + (x + 4) = 13 Reorder the terms: 2x + (4 + x) = 13 Remove parenthesis around (4 + x) 2x + 4 + x = 13 Reorder the terms: 4 + 2x + x = 13 Combine like terms: 2x + x = 3x 4 + 3x = 13 Solving 4 + 3x = 13 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 + 3x = 13 + -4 Combine like terms: 4 + -4 = 0 0 + 3x = 13 + -4 3x = 13 + -4 Combine like terms: 13 + -4 = 9 3x = 9 Divide each side by '3'. x = 3 Simplifying x = 3
| d+n=30 | | 15w-28w= | | t=5s+4.37 | | 3(x+4)+15x= | | 2t(t+1)= | | 5y+4y=36 | | p+10-2(5)=p+5+5-10 | | 9k-(7+k)=(3k+7) | | 36+15x^2-51x=0 | | Z+8=4z | | 4x-4x=2x+4x-4x | | -4(2x+7)+3x=17x+1 | | 28-6p=17-5p | | X+122+x+65=173 | | 15(y+3)=75 | | 12a+6+7a= | | x*5+11*2=x*3+36 | | 11x-99=-88 | | 7+5n=4n+18 | | 160+0.25x=290 | | 10-3m=40 | | a=7w-121 | | -3(6.5-3.7m)+3.3(6.4m+7.8)=m+3.4+8.1m+11.653 | | -18+m^2+-3m=0 | | x+3=423 | | 6(x+4)-7=6x+24 | | 6+5x+121=17x+7 | | 2x-5(x-4)=-6+4x-9 | | -18m+m^2+-3m=0 | | 14n-8= | | (1-g)*0.14+g*0.05=0.068 | | 12=4y-12 |