Question

x+4=9 ???

6+2x=4

3x+1=10

-x+5=7-3

2x+4x=18
????
me ajudem

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Answer 1

Resposta:

x+4=9

x=9-4

x=5

6+2x=4

2x=4-6

2x=-2

x=-2/2=-1

3x+1=10

3x=10-1

3x=9

x=9/3=3

-x+5=7-3

-x=7-3-5

-x=4-5

-x=-1/-1=1

2x+4x=18

6x=18

x=18/6=3