Question

21) 4.X-18=18
22) 4.X-18= -54
23) -5.X+2=-13
24) 80.X-4570= 75430
25) X+1000=1002
26) X-999=-1002
27) X+4=13+3
28) 7.X=11+10
29) 5.X+3=48
30) X-10=-39+20

equações de primeiro grau

gente me ajuda por favor é urgente

Answer 1

21) 4.X-18=18
4x = 18 + 18 => 4x = 32 => x 32/4 => x = 8

22) 4.X-18= -54
4x = -54 + 18 => 4x = -36 => x = -9

23) -5.X+2=-13
-5x = -13 -2 => x = -15/-5 => x = 3

24) 80.X-4570= 75430
80x = 75430 + 4570 => x = 80.000 / 80 => x =1.000

25) X+1000=1002
x = 1002 - 1000 => x=2

26) X-999=-1002
x = -1002 + 999 => x= -4

27) X+4=13+3
x = 16-4 => x=12


28) 7.X=11+10
7x = 21 => x =21/7 => x=3

29) 5.X+3=48
5x = 48-3 => x = 45 / 5 => x = 9

30) X-10=-39+20
x = -19 +10 => x = -9