Question

Regras de sarrus
3x 5
4 2 = 4

Answer 1

Resposta:

a)

3x.(2)-(4.5)=4

6x-20=4

6x=4+20

6x=24

x=24÷6

x=6

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b)

x,3-(8.4)=10

3x-32=10

3x=10+32

3x=42

x=42÷3

x=14

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c)

5.8-(3.x)=7

40-3x=7

-3x=7-40

-3x=-33 ×(-1)

3x=33

x=33÷3

x=11

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d)

4x.2-(9.6)=62

8x-36=62

8x=62+36

8x=96

x=96÷8

x=12

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e)

x.x-(6.7)=22

x² -42=22

x² =22+42

x² = 64

x=√64

x=8