Question

eu preciso saber o valor de y sendo o x = a 1 ou 2

a)5x+12y=20
b) 2×-3y =1
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Answer 1

Resposta:

X= 1

a) 5.1+12y=20

12y=20-5

y=15/12

y= 1,25

b)2.1-3y=1

2-1=3y

y=1/3

X= 2

a) 5.2+12y=20

10+12y=20

12y=20-10

12y=10

y=10/12

y=0,83...

b) 2.2-3y=1

4-3y=1

4-1=3y

3=3y

y= 3/3

y=1