Solution:
1) Cancel 7 on both sides
x\times 0.04=x\times 4x
2) Regroup terms
0.04x=x\times 4x
3) Use Product Rule: {x}^{a}{x}^{b}={x}^{a+b}
0.04x={x}^{2}\times 4
4) Regroup terms
0.04x=4{x}^{2}
5) Move all terms to one side
0.04x-4{x}^{2}=0
6) Factor out the common term xx
x(0.04-4x)=0
7) Solve for x
x=0,0.01
Done!
