If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.70x=2800
We move all terms to the left:
0.70x-(2800)=0
We move all terms containing x to the left, all other terms to the right
0.70x=2800
x=2800/0.70
x=4000
| (1/x)=(5/3x)-(1/6) | | 4y=-8+16 | | 2.8h=43 | | 2x/3x+18-3x=-87 | | 24+x/6=x | | (12+x)+(12+x)=x/3 | | (12+x)+(12+x)=x | | x-28=23 | | (12+x/3)+(12+x/3)=x*3 | | (12+x/3)+(12+x/3)=x/3 | | (12+x/3)+(12+x/3)=x | | (12+x/3)*2=36 | | (12+x/3)=36 | | 12x-10+10x+8=90 | | Y=-4x10^x | | 6x+8=7+13 | | 5x+11=1/2(23x-14+9x-4) | | (12+x/3)*2=x | | 12+x/6=x | | 12+x/3=36 | | 12+x/3=72 | | 12+x/3=0.5x | | 12+x/3=x/2 | | 12+x/3=x | | 12+x/3=2x | | X=x/3*2-12 | | 2x+6+5+7=22 | | 12=x/3*2 | | 12=x/3*2x | | 1+c=0 | | 12=x/3+x/2 | | 12=x/3*x/2 |