Ecuaciones de primer grado

Suma x+a=b

100

x+2=6

x = 4

200

y + 74 = 183

y=109

300

x + 12 = 25 + 5

x=18

400

y + 465 = 1 280

y=815

500

x + 14 = 30 + 5+10-2

x=29

Resta x-a=b

100

x – 7 = 18

x=25

200

x – 21 = 36

x=57

300

y – 3.5 = 9.8

y=13.3

400

y – 100 = 1 910 -10

y=2000

500

x – 13 = 4 + 2+29-7+1-6

x=23

Multiplicación ax=b

100

2x = 8

x=4

200

14x = 42

x=3

300

18x = 234

x=13

400

5x = 75 + 5

x=16

500

3x = 243 + 72+12-5+22-2

x=114

División x/a=b

100

x/7=12

x=84

200

x/2=57

x=114

300

y/2=3.7

y=7.4

400

x/14=14+4

x=252

500

x/4-10=15+5

x=120

ax +b=c

100

2x – 6 = 8

x=7

200

3x – 48 = 12

x=20

300

10x + 13 = 63

x=5

400

2x = 84 + 8

x=46

500

46x = 90 + 45 + 5 – 2

x=3