Question

math

Answer 1

Trevor solved the system of equations below. What mistake did he make in his work?

2x + y = 5
x − 2y = 10

y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
5x = 0
x = 0

2(0) + y = 5
y = 5

He should have substituted 5 + 2x

He combined like terms incorrectly, it should have been 4x instead of 5x

He subtracted 10 from the right side instead of adding 10 to the right side

He made no mistake

Answer 2

so there 5x=20 and not equal zero

Answer 3

ok ?

Answer 4

ok

Answer 5

so what step was the mistake made?

Answer 6

he subtracted 10 from the right side instead of adding

Answer 7

ok ?

Answer 8

thank you

Answer 9

If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step?

x − y = 6
4x − 3y = 12

Add the two equations together

Multiply the first equation by −4

Multiply the first equation by 3

Multiply the first equation by −3

Answer 10

good luck

yw

bye

Answer 11

bye

Answer 12

What is the value of the x variable in the solution to the following system of equations?

4x + 8y = 8
x + 2y = 2

0

2

There is no x value as there is no solution to this system

x can be any value as there are infinitely many solutions to this system

Answer 13

so realy by -3 will be right

ok ?

Answer 14

ok

Answer 15

so the last your exercise there infinitly many solutions

Answer 16

so can you tell me why ?

Answer 17

because that is what the equation is saying

Answer 18

because if you like solve this by elimination method and multiplie it by indifferent nr just to eliminat one term of them so than will be eliminated the second too

Answer 19

ok ?

Answer 20

ok

Answer 21

than good luck

bye

Answer 22

bye