2 years ago

3x+y=4 2x+y=5 solve using linear combination

Mathematics

2 answers:

Advocard [28]2 years ago

3 0

Idk what linear combination is but you can solve this way:
3x+y=4
-2x-y=-5
x=-1
3(-1)+y=4
-3+y=4
y=7
So x=-1 and y=7

BabaBlast [244]2 years ago

3 0

Answer:

(-1,7)

Step-by-step explanation:

Add the equations in order to solve for the first variable. Plug this value into the other equations in order to solve for the remaining variables.

You might be interested in

A half-dollar coin issued by the United States Mint measures 30.61 millimeters across. Nick has 9 half dollars. He lines them up

Paraphin [41]

Answer:

Step-by-step explanation:

137,745 mm

Becouse the diamter of the Half dollar is 2 double Than a raggio becoise u must moltiplicate it for Hal of the moneu u have... 4.5 x 30.61

6 0

2 years ago

Question Progress Homework Progress 4/ Work out the size of angle x. 105 140

agasfer [191]

Answer:

Step-by-step explanation:

Sum of angles of a triangle = 180

x + (180 - 105) + (180 -140) = 180

x + 75 + 40 = 180

x = 180 -75 - 40

x = 65

5 0

3 years ago

Subtract 4x from 6x-5.

Ahat [919]

Answer:

2x-5

Step-by-step explanation:

6x-5-4x

2x-5

5 0

2 years ago

Read 2 more answers

Help with this please! thank you!

Yanka [14]

29/4 hopes this help sorry if I’m wrong

8 0

3 years ago

What is the step. some help

andrew11 [14]

Answer:

Step-by-step explanation:

LM=2x+24

MN= x+28

LN=31

LN=(2x+24)+(x+28)

31=(2x+24)+(x+28)

solve

31=(2x+24)+(x+28)

31-24-28 = 2x +x

-21=3x

-7=x

6 0

3 years ago