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4(b-10)=-72
We move all terms to the left:
4(b-10)-(-72)=0
We add all the numbers together, and all the variables
4(b-10)+72=0
We multiply parentheses
4b-40+72=0
We add all the numbers together, and all the variables
4b+32=0
We move all terms containing b to the left, all other terms to the right
4b=-32
b=-32/4
b=-8
| 3/x=15/0 | | 5t-23=9t-22 | | 21x2=4(2x+1) | | X+140=x+20/3 | | 4-k=21 | | 3x+140=x/3+20 | | 15x^2-38x-18=6-7x | | 5x-6+x=7-3x+5 | | 3x140=x-20 | | 3n-8=-56 | | X+140-20=3x+20 | | -7=9-4n | | X-140=3x+20 | | X+140=3x+(x+20) | | 8a^2-37a+35=2a^2-8a | | -5=-5+7r | | -45=-5n-10 | | -1(x+18)=3(-2x-9) | | X+140=3x-20 | | 21k-15=12 | | 3x+140=x+20 | | 3x=x+140(x-20) | | 2.6(4x+2.3)=8.2x+49.9 | | 20=4(-1+x) | | 4n^2=20n+24 | | X/2=6x | | x=(x+140)=(3x-20) | | X÷2=6x | | x=(x+140)(3x-20) | | 4n^2=20+24 | | X=140+3x+20 | | X=140+3x-20 |