4x + 3y = 24 ...................A 3x − y = 5 ..................B Multiply equation B by 3 9x − 3y = 15 ...................C Add equation A to equation C 4x + 3y = 24
Substitute x = 3 into equation A 4 x 3 + 3y = 24
12 + 3y = 24 3y = 12 y = 4 |