Question

proove that x=2 and y= -1 is a solution of the equation x - 2y = 4​

Answer 1

Tiny cells protected by a thick wall and capable of producing new plants are called

a) seeds

b) spores

c) buds

d) gametes

Answer 2

Answer:

Step-by-step explanation:

solution 1 :

apply the the value of x and y in the equation

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

hence proved

solution 2 :

given x=2 and y=-1

these can be written as x-2 =0 and y+1 =0

multiply these two equations

(x-2)*(y+1) = 0

xy +x  - 2y -2 = 0

apply the value of x and y in the term xy

-2 + x - 2y -2 = 0

x - 2y - 4 = 0

x - 2y = 4              ------ (1)

this equation is the given equation

hence proved

you can use any 1 of the above solutions which is ok for you