Solve `3x +4y <= 12` graphically

Solve 3x - y = 23 and (x)/(3) + (y)/(4) = 4.

Solve : 3x+ 2y = 14 - x+ 4y = 7

Solve the simultaneous equations using Cramer's rule 3x - 4y = 10, 4x + 3y = 5

Solve graphically 3x + 4y ge 12

Solve 3x+2y=4,8x+5y=9

Solve:- 3x-5y-4=0, 9x=2y+7

Solve: {:(3x - 2y = 4),(5x - 2y = 0):}

By solving equations 3x + 4y = 23 and 5x + 12y = 39 with the help of cross multiplication method, we obtain (x)/(a) = (y)/(b) = (1)/(c ) , then find (a + 4b)/(5c) .