idolvuong200017 idolvuong200017
  • 16-07-2021
  • Mathematics
contestada

Giải hệ pt :{ 2x-3y=1
{x+2y=4

Respuesta :

ghaithgh
ghaithgh ghaithgh
  • 16-07-2021

x+2y=4 ] × (-2) —> -2x-4y=-8

2x-3y=1

-2x-4y=-8

_________o_o___

–7y=–7 —> y =1

2x-3y=1 —> 2x -3(1)=1 —> 2x-3=1 —> 2x=1+3 —> 2x=4

x=4/2 —> x=2

(x,y) —> ( 2,1)

I hope I helped you ^_^

Answer Link

Otras preguntas

During a laboratory game, those given a nasal squirt of likely to trust strangers with their money. serotonin 1 pts rather than a placebo were more
Can somebody help me if you know what this is
1) A stone is dropped from the top of a cliff. It is seen to hit the ground below after 12 s. a) How high is the cliff? b) How fast is the stone falling right b
Five chemical changes activities
which of the following food is a dietary source of vitamin B12
A holder takes an instrument for value by promising to perform or give value in the future. a. True b. False
6. Draw the rotated image on the same graph. Rotate 180° about (0, 0). A b C
Querying and presenting data from data warehouses and/or data marts for analytical purposes is known as:______
never got taught this.
Do the ratios 8:15 and 9:12 form a proportion?