Solve thw system of equation: 2x+y=18, 2x+3y=42

(3,12)

Step-by-step explanation:

2x+y=18 ... equn. (1)

2x+3y=42 ... equn. (2)

to eliminate x, subtract equn. (2) from equn. (1)

0-2y=-24

divide via by - 2

-2y/-2=-24/-2

y=12

to solve for x, put y in any equation.

from equn. (1) 2x+y=18

2x+12=18

subtract 12 from both sides

2x=6

divide via by 2

2x/2=6/2

x=3

(3,12)