Question

solve the following equation simultaneous equations 3x - 4y = -18; and x+5y =13

Answer 1

x = -2 & y=3

Step-by-step explanation:

3x-4y= -18 ...(1)

x+5y= 13 ...(2)

therefore, from (2),

x= 13-5y ...(3)

thereby, from the substitution method,

from (3) in (1),

therefore, 3[13-5y] - 4y = -18

therefore, 39-15y-4y= -18

therefore, 39+18=15y+4y

therefore, 57=19y

therefore, y=3

therefore substituting the value of y in (3),

therefore, x=13-15

therefore, x= -2

I hope this helps!!