For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x - 2y = -4
3x + y = 12

Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x - 2y = -4
3x + y = 12

anonymous · Answer

these are the possible answers...

a. -2y - 4

s. 2y - 4

c. 2y + 4

d. -2y + 4

anonymous · Answer

x=4-2y in the first equation
substitute into the second equation
3*(4-2y)+y=12
12-6y+y=12
-5y=0
y=0
x=4

amistre64 · Answer

solving an equation for a given variable is like chapter 1; this is like chapter 12 ....