Solve the system of equations using substitution.
a. (10, –1)
b. (–1, 8)
c. (20, –4)
d. (3, 6)
Something must be wrong here.
Only a. and d. obey the second equation y= -x + 9
but none obey the first equation : 3y=-1/(2x)+2
for a: -1/(2x)+2= -1/20+2 not equal 3y=-3
for d: -1/(2x)+2= -1/6+2 not equal 3y=18
So it can be solved but none of the solutions agree with it.
Please recheck problem
the second equation is 3 y = - 1/2 x + 2
3 y - one half x + 2
Ok it must be b then I'll send you the solution in a sec
I meant a
y = -x+9
substitute in the first: 3(-x+9)=(-1/2)x+2
5x/2=25 => x=25*2/5=10 and y= -10+9=-1
so its a
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