Standard form (which I assume is what they want you to turn these into) is y=mx+b.
12x-5y=20 is y=2.4x-4.
Subtract 12x from both sides, -5y=-12x+20.
Multiply both sides by -1, 5y=12x-20.
Divide both sides by 5, y=2.4x-4.
y=x+4 is already in standard form- I'm not quite sure what to do.
3x+y=3 is y=-3x+3.
Subtract 3x from both sides, y=-3x+3.
x=-y+3 is y=-x+3
Ad y to both sides, y+x=3.
Subtract x from both sides, y=-x+3.
Answer:
A
Step-by-step explanation:
Answer:
Write an equation for each statement:
:
"one number is four more than a second number."
x = y + 4
:
" two times the first number is four more than four times the second number"
2x = 4y + 4
;
From the 1st equation, substitute (y+4) for x in the above equation
2(y + 4) = 4y + 4
2y + 8 = 4y + 4
8 - 4 = 4y - 2y
4 = 2y
y = 4%2F2
y = 2, the second number
and
x = 2 + 4
x = 6, a number
Step-by-step explanation:
