If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x+21=9x+15
We move all terms to the left:
4x+21-(9x+15)=0
We get rid of parentheses
4x-9x-15+21=0
We add all the numbers together, and all the variables
-5x+6=0
We move all terms containing x to the left, all other terms to the right
-5x=-6
x=-6/-5
x=1+1/5
| x+24+3x=180 | | 4p+18=-12+p | | 12/30+25m/30=47/30 | | 2c-c-1=15 | | -12n+10=-11n-6 | | -12(4+k)=-12k+10 | | 7(5+x)=-28 | | 3(x-1)-2x+3=5x+4(x+10 | | 9z=5z+20 | | 4y=9.5 | | 1/3(3x-1)=-3/5 | | 14p-9p-5=20 | | 3(x-3)-5=7+5(x-7) | | -3+8v=77 | | 4=m(4)= | | x+15+3+17x=180 | | 2(x-1)+3(x=2) | | 7x-2x+4=5x+3 | | 50=10×2×h | | 6(5-4f)=25 | | -2/u=-1 | | z/5-7=4(1/3) | | 4y+63+2y+87=180 | | (5x-15)÷8+2=7 | | 10x-25=5X+9 | | 4+m/2=10 | | 6(10-7m)=6(4m+10) | | 3x+8=15+2x | | 5+4(2+2a)=-1 | | -144=3(5b-3) | | h/25-5/5=2/5 | | h/25-5/5=2/3 |