lmoonzl
lmoonzl
30-04-2020
Mathematics
contestada
Solve using substitution.
y = -10x-10
y = -3x + 4
Respuesta :
heyimapanda18
heyimapanda18
30-04-2020
-10x-10 = -3x+4
+3x +3x
————————
-7x-10 = 4
+10 +10
————————
-7x = 14
then divide -7 on both side of the equal sign
you’ll get x=-2
then plug in -2 as x into one of the equations ( it doesn’t matter which one)
y= -10(-2)-10 = 20-10= 10
so y=10
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