Question

write any four solution of 3 X + 4 Y is equal to 12​

Answer 1

$3x + 4y = 12 \\ putting \: x = 0 \\ 3(0) + 4y = 12 \\ 0 + 4y = 12 \\ 4y = 12 \\ y = 4 \div 12 \\ y = 3 \\ putting \: x = 1 \\ 3(1) + 4y = 12 \\ 3 + 4y = 12 \\ 4y = 12 - 3 = 9 \\ 4y = 9 \\ y = 9 \div 4$
like this you can do all