Question

6x+4y=42 -3x+3y=-6 elimination

Answer 1

6x + 4y = 42-- reduces to 3x + 2y = 21

now we have :
3x + 2y = 21
-3x + 3y = -6
-------------add
5y = 15
y = 15/5
y = 3
now sub 3 in for y in either of the equations to find x
3x + 2y = 21
3x + 2(3) = 21
3x + 6 = 21
3x = 21 - 6
3x = 15
x = 15/3
x = 5
check...
-3x + 3y = -6
-3(5) + 3(3) = -6
-15 + 9 = -6
-6 = -6 (correct)
SOLUTION IS : (5,3)

Answer 2

any questions ?

Answer 3

thank you so much