PotatoninjaGirl PotatoninjaGirl

28-03-2016
Mathematics

Answered

How do I solve the following by using substitution?

Y=4x+9

10x=18 -2y

Verified Answer :

mecca99 mecca99

28-03-2016

plug 4x=9 in for y:
10x=18-2(4x+9)
10x=18-8x-18
10x=-8x
18x=0
x=0

now plug 0 in for x:
y=4(0)+9
y=9

to check, plug x and y back into one of the equations to make sure they are right:

10(0)=18-2(9)
0=18-2*9
0=18-18
0=0

Answer Link

Related Questions

Villa Health is working to engage all medical staff to move into a healthcare outcomes framework that seeks to support longterm wellness for all clients This go

InstructionsRead the question carefully and select the best answerWhy is it ironic that Puck claims Lord what fools these mortals be in 32115A Puck causes the m

The early Egyptian society had a structure that included multiple social classes Which group was at the bottom of the hierarchy

5 rational nos between 37 amp47 explain step by step semsee pls help fast

a detail that is not needed is called information bonus important irrelevant

What sort of group tends to be responsible for genocidal acts

how do I simplify y33 without parentheses

Evaluate 291423

Trade prospered during the period of the Black Death True False

Which word in the sentence is an adverb Owl hoots can be quite loud a Owl b loud c hoots d quite