LEVEL
Solve the following systems of equations:
1. 11x + 15y + 23 = 0
7x - 2y - 20 = 0
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Answered by
3
Answer:
7x-2y-20=0
7x-2y =20
x = 20+2y/7 –––eqn.1
11x+15y+23=0–––eqn.2
by (1)&(2)
11(20+2y/7)+15y+23=0
220+22y/7+15y+23=0
220+22y+105y/7 =-23
220+127y =-23(7)
127y=-161-220
y =-381/127
y= -3
so. x=20+2(-3)/7
x=20-6/7
x=14/7
x=2
i hope u got that
Answered by
1
Answer:
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