If it's not what You are looking for type in the equation solver your own equation and let us solve it.
r-7=-21
We move all terms to the left:
r-7-(-21)=0
We add all the numbers together, and all the variables
r+14=0
We move all terms containing r to the left, all other terms to the right
r=-14
| 3x-9-5x=-3x-6 | | q=10-0.25 | | 6m+22=6m-5 | | 3x-10+7x-2=2x+30 | | -1-4=2e/8 | | 2y+6=-3y+16 | | 250-450=2l+150 | | 4x-16=2(4x-4) | | 12k=47+91+42 | | 5/2b+(-25/2)=-10 | | x+3=3(4x-4) | | -5-18=8y-7 | | 32+x=48 | | (4x+3)+(7x+1)=180 | | 2.5x-35=90 | | x^2+2Y=3 | | x=-6-7-8 | | 3/4x+5=1/4+1/4x | | X+1/5=1/4(20x-124/5) | | 2(16-x)=-48(x+7) | | -13-12=10g-25 | | 4u−2u-18=−72 | | x+x+(2x+3)=106 | | X^2+11x=33 | | 24.5=15+0.38g | | 9+3/4x=7/8x-8 | | 2,436=42(p+15) | | 0.5x=x-9 | | 3a-4+9=16 | | 8m-4=1 | | 2.5=-t/4.5 | | 25+2(4g-3)=40 |