Question

Tìm các giá trị nguyên dương nhỏ hơn 10 sao cho: 4x-21=3y

Answer 1

\(x\)	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 \(\left(x;y\right)=\left(6;1\right);\left(9;5\right)\)