Solve the following system by the substitution method. Show your work.

{2x−7y=12
−x+3.5y=−6

see the explanation

The system has infinity solutions

Step-by-step explanation:

we have

----> equation A

isolate the variable x

----> equation B

Solve by the substitution method.

substitute equation B in equation A

solve for y

The system has infinity solutions

That means The equation A and equation B are the same line

Verify

we have

----> equation A

----> equation B

Multiply by -2 both sides equation B

so

Equation A and equation B is the same line

The system has infinity solutions

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.