If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21=-3(a-3)
We move all terms to the left:
21-(-3(a-3))=0
We calculate terms in parentheses: -(-3(a-3)), so:We get rid of parentheses
-3(a-3)
We multiply parentheses
-3a+9
Back to the equation:
-(-3a+9)
3a-9+21=0
We add all the numbers together, and all the variables
3a+12=0
We move all terms containing a to the left, all other terms to the right
3a=-12
a=-12/3
a=-4
| .6-7(a+1)=-3(2-a) | | 21=-3(a–3) | | 210+x=425 | | u=6=84 | | 13x-1+11=36 | | (x+6)(x-6)-36=0 | | x^2-(x-6)^2=0 | | 54=x3 | | x+210=425 | | 5x+40x+30=15 | | -5(6-5x)=(2x-4) | | x/9=13/11 | | -5(6-5x)=2x-4) | | 16=3y+7 | | -5x-21=-3 | | (4x-3)+(6x+3)=180-(9x+12) | | 1/2(b+14=b+14/2 | | 3q^2-16q+25=0 | | 3x8=6x | | -2(6c-10)=80 | | 2+4(5x-8)=20x-34 | | 2+4(5x-8)=20x-32 | | 7a-9=3-a | | 65x+5(12-(65x)/5)=12 | | v2=52 | | 2(x+4)+8x=-14 | | 60(-)3x=58 | | (d/2)/12+(d/2)/15=3 | | 4x-8x=3x+7 | | -7(z-6)=10 | | f/4− 3=1 | | 2x+6+2=4x+5 |