Question

Which step contains a mistake in solving for the system of equations?

x + 2y = 5
y = 3x - 8

1. x + 2(3x) - 8 = 5
2. x + 6x - 8 = 5
3. 7x = 13
4. x = 13/7
5. 7x 8 5

Answer 1

First step, correct answer is (3,1)

Explanation:

1.it should be x+2(3x-8)=5

2. x+6x-16=5

3.7x=21

4. 7x/7=21/7

5. x=3

then you can eitheir take x+2y=5 or y=3x-8 i suggets taking second option as it is easier, just input values for x in

) 3x-8=y

6. 3(3)-8= 1

7. x=3, y=1