alyssakadas
alyssakadas alyssakadas
  • 13-02-2017
  • Mathematics
contestada

solving system of equations by substitution

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 13-02-2017
y=3x-10 and 3x+2y=16
y=3x-10
subsitute 3x-10 for y in other equation

3x+2y=16
3x+2(3x-10)=16
distribute
3x+6x-20=16
9x-20=16
add 20 both sides
9x=36
divide both sides by 9
x=4

sub back

y=3x-10
y=3(4)-10
y=12-10
y=2

x=4
y=2
(4,2) is soluiton
Answer Link

Otras preguntas

A model rocket is shot straight upward with an initial velocity of 32 m/s. Its upwards acceleration is a constant 6 m/s2. When the fuel is used up at a height o
Factor and solve the quadratic equation 2x^2+11+5=0
There are 30 students Mr. Robert's home room 45% of the students ride the bus. How many students ride the bus?
Identify the type of error in the sentence. If the sentence contains no error, select c. To prepare for the game, many warm-up exercises are necessary. Definiti
What does 3 times 1/3 also what does 12 times 1/3 also what is 9 times 1/9
-7/10 - 2/5 in simplest form
What is an angle that crosses itself called?
The convention for revision of the Articles of Confederation elected as chairman:
What are the cause of the Spanish American War?
What drives plate tectonics in the earths interior