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-5+c=-10
We move all terms to the left:
-5+c-(-10)=0
We add all the numbers together, and all the variables
c+5=0
We move all terms containing c to the left, all other terms to the right
c=-5
| 18-15=x | | 8w=8*10 | | 0.5y-16=5 | | -1/3(x-9=-1 | | 5.8÷x=2.9 | | 5y+12=4y+5 | | 8p+5=24 | | w+6=14+6 | | b+18=12 | | 7*n=50-3n | | 8^{3x}=2097152 | | 2(v+4)=6=24 | | 7y=9^2 | | (6x+26)+5x=180 | | 61+5x-15+8x-8=180 | | 10x–55=75 | | (2x-3/7)=(3x-5/10) | | 100=a/13.2 | | 1.4m+4=5.05 | | (7x+23)=(5x+25) | | 0.6x-1.5=4.8 | | 3y/5-y/5=2y/5 | | 3x(4+8)=120 | | 4w=4*9 | | x-1.8=6.9 | | 0=x^2+7x+5 | | 3/4x+9=-15 | | (4x-9)=(13x+36) | | 7x2+14x-35=0 | | 0.10x+0.05(8-x)=0.10(8) | | 7k=5=51 | | 7x+14x-35=0 |