1. Cross multiply:
4 * x + 18 = 7 * 28
Simplifying
4 * x + 18 = 7 * 28
2. Reorder the terms:
4 * 18 + x = 7 * 28
18 * 4 + x * 4 = 7 * 28
72 + 4x = 7 * 28
3. Multiply 7 * 28
72 + 4x = 196
Solving
72 + 4x = 196
Solving for variable 'x'.
4. Move all terms containing x to the left, all other terms to the right.
5. Add '-72' to each side of the equation.
72 + -72 + 4x = 196 + -72
6. Combine like terms: 72 + -72 = 0
0 + 4x = 196 + -72
4x = 196 + -72
7. Combine like terms: 196 + -72 = 124
4x = 124
Divide each side by '4'.
8.Simplifying
x = 31
This should help you...
