Hi it's me again with another one that I'm probably making a simple mistake on
x - y = 1
5x + 3y = 45
Using only the substitution method.
here's what I've got:
x - y - y = 1 - y
x = 1-y
5(1-y) + 3y = 45
5-5y + 3y = 45
so -5y + 3y = -2y and 45 - 5 = 40
I think this may be where I'm going wrong. But I am my own teacher w/ only one example in a workbook for a guide
so -2y = 40 or 2y = -40
y = -20
now substituting -20 for y in the first problem:
x - (-20) = 1
x = -19
works great for the first problem but for the second problem...
5(-19) + 3 (-20) = 45
-45 + -60 = -105
and that's how good of a teacher I am for myself
x - y = 1
5x + 3y = 45
Using only the substitution method.
here's what I've got:
x - y - y = 1 - y
x = 1-y
5(1-y) + 3y = 45
5-5y + 3y = 45
so -5y + 3y = -2y and 45 - 5 = 40
I think this may be where I'm going wrong. But I am my own teacher w/ only one example in a workbook for a guide
so -2y = 40 or 2y = -40
y = -20
now substituting -20 for y in the first problem:
x - (-20) = 1
x = -19
works great for the first problem but for the second problem...
5(-19) + 3 (-20) = 45
-45 + -60 = -105
and that's how good of a teacher I am for myself