Question

2x-3y=12 and x+2y+1=0​

Answer 1

Step-by-step explanation:

2x-3y=12

x+2y=-1 { multiply 2 in both}

-7y=14

y=-2

X=3

Answer 2

Answer:

(i) -12

(ii) -3

Explanation step by step:

(i) 2x - 3y = 12

2x - 3y = -1y

-1y = 12

y = 12 / -1 = -12

(ii) x + 2y + 1 = 0

(when a variable doesn't have a number with it, we take it as 1, with the variable) 1x + 2y = 3xy

3xy + 1 = 0

3xy = 0 - 1 = -1

3xy = -1

xy = -1 / 3 = -3

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