Question

solve; 1/3(x-y)=1/4(y-1) ; 1/7(4x-5y)=x-7 by elimination method

please anybody can u teach me the method​

Answer 1

Answer:

here's your answer dear mark as brilliant

Step-by-step explanation:

Given

… (1)

And

… (2)

Expressing x of equation (1) in terms of y,

… (3)

Substituting (3) in (2),

⇒ 4 (2y – 3) = 7 (7y – 31)

⇒ 8y – 12 = 49y - 217

⇒ 217 – 12 = 49y – 8y

⇒ 205 = 41y

∴ y = 5

Substituting y value in (3),

∴ x = 8

∴ By solving, we get x = 8 and y = 5.