( | 20 | + | x | ) | × | 5 | = | ( | 15 | + | x | ) | × | 6 |
Left side of the equation = | 20 | × | 5 | + | x | × | 5 |
= | 100 | + | x | × | 5 |
100 | + | 5 | x | = | ( | 15 | + | x | ) | × | 6 |
Right side of the equation = | 15 | × | 6 | + | x | × | 6 |
= | 90 | + | x | × | 6 |
100 | + | 5 | x | = | 90 | + | 6 | x |
5 | x | − | 6 | x | = | 90 | − | 100 |
- | x | = | 90 | − | 100 |
- | x | = | 90 | − | 100 |
- | x | = | - | 10 |
10 | = | x |
x | = | 10 |