11-01-2020
Mathematics

contestada

Solve this equation 90x-60y is equal to 68 and 90x-70y is equal to 91

Respuesta :

texaschic101 texaschic101

11-01-2020

Answer:

Step-by-step explanation:

90x - 60y = 68.....multiply by -1

90x - 70y = 91

---------------------------

-90x + 60y = -68 (result of multiplying by -1)

90x - 70y = 91

---------------------------add

-10y = 23

y = -23/10 <===

90x - 60y = 68

90x - 60(-23/10) = 68

90x + 138 = 68

90x = 68 - 138

90x = - 70

x = -70/90

x = -7/9 <=====

Answer Link

luckyhussien65 luckyhussien65

12-01-2020

X=-7/9

Thanks so much

Answer Link

Otras preguntas

what can you not make more than two related facts for 6 * 6 I WILL MARK BRAINLIEST

How is the passage from TOM SAWYER similar to the passage from HUCKLEBERRY FINN? Both passages are narrated by the supposed author. B) Both passages are written

1) what is the potential energy at the end of the loop? 2)what is the kinetic energy at the end of the loop(based upon photogate time? release the car and rec

Which of the following is an example of a food preparation career?restaurant manager baker server dish washer

which option is an example of an open system a. a pressure cooker b. the sun in outer space c. an erupting volcano d. a fertilized chicken egg

Which of the following choices is NOT a characteristic of unicellular: Tend to be less complex Consists of many cells Do not have cell differentiation Able to r

solve using unit rates. . David gets paid $36 for 4 hours of work. Kevin gets paid $55 for 6 hours of work. How much does each person get paid per hour and who

Which statement correctly describes the way DNA moves through a gel electrophoresis? A. DNA is negatively charged and is therefore attracted to the positively c

Why do black objects get warm when visible light shines on them?

What does a store's buyer do? a) Keeps track of competitors pricesb) Purchases merchandise to sellc) Tests the effectiveness of a store's sales force by pretend