When using the substitution method, what expression for x in the second equation would be substituted in the first equation?

4x - 7y = -9
x + 3y = 12

Question

When using the substitution method, what expression for x in the second equation would be substituted in the first equation?

4x - 7y = -9
x + 3y = 12

anonymous · Answer

hey think you can help me with a few others after this one

campbell_st · Answer

the easiest is x = 12 - 3y

or you could use  3y = 12 - x ...... which can become y = 4 - x/3

anonymous · Answer

a. -3y + 12	
	 b. 3y - 12	
	 c. -3y - 12	
	 d. 3y + 12

anonymous · Answer

these are the possible answers

anonymous · Answer

so b.

anonymous · Answer

is that right

anonymous · Answer

What is a possible first step in eliminating a variable in the following system of equations?

x + 7y = -15
2x + 7y = -9

	 a. Multiply the first equation by -1.	
	 b. Multiply the second equation by -1	
	 c. Multiply the first equation by -2.	
	 d. All of the above

anonymous · Answer

for the first question is the answer b