( | 30 | - | 7 | ) | ( | 80 | + | 10 | x | ) | × | 9 10 | = | 2400 |
Left side of the equation = | 30 | ( | 80 | + | 10 | x | ) | × | 9 10 | - | 7 | ( | 80 | + | 10 | x | ) | × | 9 10 |
= | 27 | ( | 80 | + | 10 | x | ) | - | 63 10 | ( | 80 | + | 10 | x | ) |
= | 27 | × | 80 | + | 27 | × | 10 | x | - | 63 10 | ( | 80 | + | 10 | x | ) |
= | 2160 | + | 270 | x | - | 63 10 | ( | 80 | + | 10 | x | ) |
= | 2160 | + | 270 | x | - | 63 10 | × | 80 | - | 63 10 | × | 10 | x |
= | 2160 | + | 270 | x | - | 504 | - | 63 | x |
= | 1656 | + | 207 | x |
1656 | + | 207 | x | = | 2400 |
207 | x | = | 2400 | - | 1656 |
207 | x | = | 744 |
x | = | 744 | ÷ | 207 |
= | 744 | × | 1 207 |
= | 248 | × | 1 69 |
x | = | 248 69 |
x | = | 3.594203 |