Question

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Answer 1

Step-by-step explanation:

1. 2x + 3y = 10

7x + y = 5

therefore (Multiply 3 by 7x + y = 5) to get the number of 1 term.

so term will be

2x + 3y = 10

21x + 3y = 15

(we have to cut y so use subtraction)

2x + 3y = 10

- 21x - 3y = -15

= -19x = -15

so: x = -19 ÷ -15

(minus and minus get plus)

x = 19 ÷ 15

So the answer is x = 19 ÷ 15 = 3.8

(Now we have to find the y)

2x + 3y = 10

7x + y = 5

2 × 3.8 + 3y = 10

7.6 + 3y = 10

3y = 10 - 7.6

3y = 2.4

y = 3 ÷ 2.4

SO THE ANS IS

x = 3.8

y = 1.25

2. 3x + 4y = 9

2x + 3y = 8

therefore(we have to get 2 terms same so Multiply 3 by 2x + 3y = 9 and 2 by 3x + 4y = 9

so.

6x + 8y = 18

6x + 9y = 24

(we have to cut 1 term so use subtraction)

6x + 8y = 18

-6x - 9y = -24

-1y = -6

y = -1 -6

y = 6

(Now we have to find value of x)

3x + 4 × 6 = 9

3x + 24 = 9

3x = 9 -24

3x = 15

x = 3 ÷ 15

x = 5

SO THE ANS IS

x = 5

y = 6

3. x + y = 1

x + y = 2

(Now we have to add the equation)

x + y = 1

+ x + y = 2

so.

2x = 3

x = 3 ÷ 2

x = 1.5

(Now we have to find value of y)

1.5 + y = 1

y = 1 -1.5

y = -0.5

SO THE ANS IS

x = 1.5

y = -0.5

4. 2x + y = 7

x + y = 2

(Now we have to subtract)

2x + y = 7

-x + y = 2

1x = 9

x = 9

(Now let's find the value of y)

9 + y = 2

y = 2-9

y = 7

SO THE ANS IS

x = 9

y = 7

5. 5x + 8y = 3

3x + 9 = y

(We have to take y in the place of 9 and shift 9 to the place of y)