Question

8) Indique a Incógnita de cada equação
a) 2x – 3 = 15
b) 4y = 30 – 18
c) 5z – 6 = z + 14
d) m + 4 = 20

Answer 1

Olá , João , vamos la ?! 

A) 2x - 3 = 15 

Número pro lado , letra pro outro.

2x = 15 + 3

2x = 18

x = 9

B) 4y = 30 - 18

4y = 12

y = $\frac{12}{4}$ 

y = 3

C)5z - 6 = z + 14

5z - z = 14 + 6

4z = 20

z = $\frac{20}{4}$ 

z = 5

D) m + 4 = 20

m = 16

Answer 2

a)
2x – 3 = 15 
2x = 15 + 3
2x = 18
x = 18/2
x = 9

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b)
4y = 30 – 18 
4y = 12
y = 12/4
y = 3

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c)
5z – 6 = z + 14 
5z - z = 14 + 6
4z = 20
z = 20/4
z = 5

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d)
m + 4 = 20 
m = 20 - 4
m = 16

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