Question

х — 4y — 1 4х Зу = 91

Answer 1

we have the system

× = -4y -1 ------> equation A

4x -3y =91 -----> equation B

substitute equation A in equation B

so

4(-4y-1)-3y=91

solve for y

-16y-4-3y=91

-19y=91+4

-19y=95

y=-5

Find the value of x

x=-4(-5)-1

x=19

the solution is the point (19,-5)