solve the system of equations using the substitution method.
y=2x-5
3x+4y=-9
2 answers
is (1,-3) correct
correct, your work should look something like this:
y=2x-5
3x+4y=-9
sub the value of y from the first into the second:
3x + 4(2x-5) = -9
3x + 8x - 20 = -9
11x = 11
x = 1
sub x = 1 back into the first
y = 2(1) - 5)
= 2 - 5
= -3
y=2x-5
3x+4y=-9
sub the value of y from the first into the second:
3x + 4(2x-5) = -9
3x + 8x - 20 = -9
11x = 11
x = 1
sub x = 1 back into the first
y = 2(1) - 5)
= 2 - 5
= -3
7 answers