Work Step by Step
We need to get the x alone. Thus, we cancel out the addition by subtracting 4/5 on both sides. This leaves us with the equation $2x/7=4.2.$ $ x$ is being multiplied by 2/7, a fraction, so we must multiply both sides by the reciprocal of 2/7, 7/2, to get that $x=14.7$. We plug 14.7 in for x and confirm that our answer is, indeed, correct.