Question

RESOLVA AS EQUAÇÕES DE 1°GRAU

1- 12×-10+2×=74-2×

2- 250-19×+3×=6×-150

3- 3,5×+9,5-1,5×=×-5,5

4- 12,9×-20,5+2,1×=5×+30,5

5- 500×-180-130×=70×+320

6- 32+41×-3×=8×-28+0

7- 122-39×-80=11×-78

8- 100×-35×+60=5-120

9- 131×-19×+88=22×-2

10- 250-300+9×-×=5×+70

Answer 1

a)

12x+2x+2x=74+10

16x=84

x=84/16=21/4

b)

250+150=19x-3x+6x

400=22x

x=400/22=200/11

c)

3,5x-1,5x-x=-9,5-5,5

x=-15

d)

12,9x+2,1x-5x=30,5+20,5

10x=51

x=51/10=5,1

e)500x-130x-70x=320+180

300x=500

x=500/300=5/3

f)

41x-3x-8x=-32-18

30x=-60

x=-60/30=-2

g)

122-80+78=11x+39x

120=50x

x=120/50=12/5

h)

100x-35x=-120-60+5

65x=-175

x=-175/65=-35/13

i)

131x-19x-22x=-88-2

90x=-90

x=-90/90=-1

j)

9x-5x-x=-250+300+70

3x=120

x=120/3=40