ariana524 ariana524

19-01-2021
Mathematics

contestada

— 4х + 7y = 20
у = 3х + 15

Respuesta :

Аноним Аноним

19-01-2021

Answer:

x=-5

Step-by-step explanation:

[tex]-4x+7(3x+15)=20\\ -4x+21x+105=20\\ 17x+105=20\\ 17x=20-105\\ 17x=-85\\ x=-5[/tex]

Answer Link

Otras preguntas

In the context of the passage, which of the following versions of the underlined text is the most effective way to introduce the evidence provided in sentence 1

what is the slope of the line through the point (-4,6) and (-3,-1)? a. -2/1 b. -7/1 c. -1/2 d. -1/7

Please help f(x)=1 - 2x g(x)= -x0 h(x)= x + 1) Find the value of(i) gf2),Answer(a)(i)[2]

on a piece of paper graph y+2> -3x-3

What motive did the Federalists have for pushing the Alien Act through Congress in 1798? The new law made immigrants pay higher taxes, which the Federalists hop

PLEASE HELP!!!!! Which of these equations, when solved, gives a different value of x than the other three? 9.1 = -0.2x + 10 10 = 9.1 + 0.2x 10 – 0.2x = 9.1 9.1

FIRST ANSWER GETS BRAINLIEST! (WILL ONLY COUNT IF YOU ANSWER CORRECTLY) You are purchasing a car for $12,465.00 plus 5.65% sales tax. You make a $1,300.00 down

Help will give the brain crown or whatever it is!!!

Thanksgiving is November 26th. Today is November 9th. How many seconds are there until Thanksgiving Day?

Please Help Quick ASAP Hurry This is Pre-Algebra 1 The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. What was the change in the