Mathematics, 20.08.2019 21:00 hello4540

Solve, using the substitution method.
y = 2x + 6
3x – y = 6
question 4.4. solve, using the substitution method.
y– 2x = 8
16 + 4x = 2y

Answers: 2

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Answers

Y = 2x + 6 ;
y = 3x - 6 ;
2x + 6 = 3x - 6 ;
2x - 3x = - 6 - 6 ;
-x = - 12 ;
x = 12 ;
y = 2*12 + 6 ;
y = 30 ;
The solution is ( 12 , 30 ) ;

Answer from: biennhan9796

Y = 2x + 6 ⇒ 2x - y = -6 ⇒ 6x - 3y = -18
3x - y = 6 ⇒ 3x - y = 6   ⇒ 6x - 2y = 18
   -y = -36
      y = 36
      2x - 36 = -6
   +36 +36
   2x = 30
      2 2
   x = 15
   (x, y) = (15, 36)

1y - 2x = 8 ⇒ -2x + 1y = 8   ⇒ 4x - 2y = -16
16 + 4x = 2y ⇒ 4x - 2y = -16 ⇒ 4x - 2y = -16
   8x = 0
      8    8
   x = 0
      4(0) - 2y = -16
      0 - 2y = -16
      -2y = -16
   -2    -2
   y = 8
         (x, y) = (0, 8)

Answer from: Quest

1. 8

2. 9

3. 20

4. 3

5. 17

6. 2.2

7. 11.25

8. 1

9. 14

10. 2

step-by-step explanation:

thats the first half

Answer from: Quest

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1

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Solve, using the substitution method.
y = 2x + 6
3x – y = 6
question 4.4. solve, u...