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13=15+4x
We move all terms to the left:
13-(15+4x)=0
We add all the numbers together, and all the variables
-(4x+15)+13=0
We get rid of parentheses
-4x-15+13=0
We add all the numbers together, and all the variables
-4x-2=0
We move all terms containing x to the left, all other terms to the right
-4x=2
x=2/-4
x=-1/2
| 0.04x+0.045(9000-x)=370 | | z+7+104=180 | | 0.06x+0.18(x+3)=2.94 | | 4s-120=960 | | 2x+2x-20+x-28.5=180 | | 120s-4=960 | | -3z+8+76=180 | | 13.5x=40.5 | | 4(s-120)=960 | | 4(p+2)=2(p+5) | | 120(s-4)=960 | | 4(p+5)=2(p+5 | | 3(d-15.70)=2.30 | | 15.70(d-3)=2.30 | | 15.70d-3=2.30 | | 3d-15.70=2.30 | | 6z+4=11 | | 5e-1/3=3/4 | | 2g-1.4=3.6 | | 2c=4c-18 | | 7(f-6)=228 | | 6(f-7)=228 | | 6f-7=228 | | 22(k+308)=440 | | 308k+22=440 | | 2(r+6)=4(r+4 | | 308(k+22)=440 | | 22k+308=440 | | 21t-8=115 | | 8(t-21)=115 | | 1.2+1.7=30-1.5x | | 21(t-8)=115 |