The expression 4.95 + 0.07x

Well the expression has to equal 0. So, 4.95+0.07x=0. Subtract 4.95 from 0, which equals - 4.95. The equation should look like this: 0.07x=-4.95. Then, divide by 0.07 because you want x by itself. The answer should be - 70.7. Check the answer by replacing x and - 70.7