Question

Descubra o valor do ( X )

álgebria

3 X - 21 =0


6+X =6,4


0,5 X - 9 =1,5


4 X + 3 = -19

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Answer 1

a) 3X-21=0. b) 6+X=6.4

=3X=21. X=6.4-6

X=21/3. X=0.4

X=7

c) 0.5X-9=1.5. d) 4X+3=-19

0.5X=1,5+9. 4X=-19-3

0.5X=10.5. 4X=16

X=10.5-0.5. X=16/4

X=10. X=4