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420;75
x+1/(x^2)
8*x-3 = 7*x+4;x
x
6-(2/5)
4.20;0.75
| 4-3(x-2)=-2 | | 4/5÷5/21=4/5÷x | | 2/3m-6=12 | | x=10+8(15-2) | | 6-2/5 | | 9(4)-5=67 | | p-6=-s | | 89-4x=37 | | 7x^2-28x+17=-7 | | x/8=72/96 | | 9(6)-5=67 | | x^2+4x+21=-7x+3 | | 6.5x-14=57.5 | | 9(4)-5=56 | | 9(-5)-5=56 | | 4x-5+10=5x+2(4-x)+1 | | -7x^(2/3)=-343 | | 6x-4x=35 | | 9(-1)-5=56 | | 4p-8=16p | | 12+x=7x | | 5(-8-1)=-45 | | 6s-28=32 | | -2x=3x+5x | | 5(-2-1)=-45 | | 5(4-1)=-45 | | 2j-j-j+3j=12 | | 5(7-1)=-45 | | 17s-13s-12s=8 | | k(x)=x^2-2 | | 5+2=12-a | | v-v+2v-2v+4v=4 |