lukerothbacher lukerothbacher
  • 02-02-2019
  • Mathematics
contestada

3x + 4y = 5
X- 3y = -7


Solve by substitution

Respuesta :

meredith48034
meredith48034 meredith48034
  • 02-02-2019
x = 3y - 7
3x + 4y = 5

3(3y - 7) + 4y = 5
9y - 21 + 4y = 5

13y - 21 = 5

13y = 26

y = 2

x - 3(2)= -7

x - 6 = -7

x = -1

(-1, 2)
Answer Link

Otras preguntas

If a = b + 2, then (b - a)⁴ = ?
How do u do this ??? Alistair buys an antique chair for £600. It is expected to increase in value at the rate of 4.5% each year. How much is it expected to be w
Which decimal is equal to 7/10?A. 0.71B. 0.7C. 0.07D. 0.071
The last of Wilson's Fourteen Points called for
what is 5.71 rounded to the nearest whole number
shayla says that one kilometer is equal to one million millimeters. is She correct? explain why?
Why is the enlightenment considered the turning point in world history
Any facts on string art? I can't find any!
Explain why shorelines are always changing
what is 5.71 rounded to the nearest whole number