Question 272377
8x - 5y = -47
8X=5Y-47
X=(5Y-47)/8
4x + 3y = -7
4(5Y-47)/8+3Y=-7
(20Y-188)/8+3Y=-7
(20Y-188+3Y*8)/8=-7
20Y-188+24Y=-56
44Y=-56+188
44Y=132
Y=132/44
Y=3 ANS.
X=(5*3-47)/8
X=(15-47)/8
X=-32/8
X=-4 ANS.
PROOF:
4*-4+3*3=-7
-16+9=-7
-7=-7