Question

Solve.
y=2x-6
3x+y=4
x=
y=

Answer 1

QUESTION 1

The given system of equation,

We simplify to get.

The correct answer is option A.

1.

A.) (4, −2)

2.

x = -7

y = 2

3.

x = 5

y = 14

QUESTION 2

The given system of equations is

and

We make y the subject in equation (2) to get,

We put equation (3) into equation (1) to obtain,

We group like terms to get,

This implies that,

we divide through by to get,

Hence the x-coordinate is

QUESTION 3

The given system is

and

We make the subject in equation (2)

We put equation (3) into equation (1) to obtain,

We expand the bracket to get,

Group like terms to get,

We simplify to get;

This implies that,

Therefore the y-coordinate is 14.

Explanation: