hello ecverone
\(x\) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
\(3y=4x-21\) | \(-17(l)\) | \(-13(l)\) | \(-9(l)\) | \(-5(l)\) | \(-1(l)\) | \(3(n)\) | \(7(l)\) | \(11(l)\) | \(15(n)\) |
\(y\) | \(\varnothing\) | \(\varnothing\) | \(\varnothing\) | \(\varnothing\) | \(\varnothing\) | \(1\) | \(\varnothing\) | \(\varnothing\) | \(5\) |
Vậy \(\left(x;y\right)=\left(6;1\right);\left(9;5\right)\)