149k views
13 votes
Substitution 8th grade math homwork. 1 question
First person to get it answer gets reward

Substitution 8th grade math homwork. 1 question First person to get it answer gets-example-1
User Danjp
by
8.2k points

2 Answers

7 votes

Answer:

(5, 11) point form

x=5,y=11 equation form

Explanation:

User BFry
by
7.9k points
7 votes

Answer: (5, 11)

Explanation:

y = 2x + 1

x + y = 16

Substitute 2x + 1 for y in 'x + y = 16'

x + y = 16

x + (2x + 1) = 16

3x + 1 = 16

Subtract both sides by 1

3x = 15

Divide both sides by 3

x = 5

Now to find y

Since we know what x is, we can use one of the equations and substitute 5 for x. I'll use both to show that you get the same answer.

Second equation:

x + y = 16

5 + y = 16

Subtract both sides by 5

y = 11

First equation:

y = 2x + 1

y = 2(5) + 1

y = 10 + 1

y = 11

The solution would be (5, 11)

User Thandi
by
8.4k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories