10 | × | 8 | + | 70 100 | ( | x | − | 10 | ) | = | 164 |
Left side of the equation = | 80 | + | 70 100 | ( | x | − | 10 | ) |
80 | + | 70 100 | ( | x | − | 10 | ) | = | 164 |
Left side of the equation = | 80 | + | 70 100 | x | − | 70 100 | × | 10 |
= | 80 | + | 70 100 | x | − | 7 |
= | 73 | + | 70 100 | x |
73 | + | 70 100 | x | = | 164 |
70 100 | x | = | 164 | − | 73 |
70 100 | x | = | 91 |
x | = | 91 | ÷ | 70 100 |
= | 91 | × | 100 70 |
= | 13 | × | 100 10 |
x | = | 1300 10 |
x | = | 130 |