S2 summer holiday homework
21. which of the following equations are linear equations in two unknowns?
i. xy + 2y=3
1. x-2y = y
iii. 3x + 2y = 5
.
a. i and ii only
b. i and iii only
c. ii and iii only
d. i, ii and iii

I. xy + 2y=3       Not linear equation because is grade 2 equation  (xy).

II. x-2y = y              Are linear equations in two unknowns  (x and y).

III. 3x + 2y = 5      Are linear equations in two unknowns  (x and y).

.

£56

step-by-step explanation: