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100

Double a number is fifteen

2x=15

100
x + 3 = 12
x = 9
100
x - 4 = 10
x = 14
100
2x = 120
x = 60
100
x/3 = 15
x =45
200
20 more than a number is twelve
x + 20 = 12
200
x + 90 = 120
x = 30
200
x - 8 = 20
x = 28
200
4x = 124
x = 31
200
x/7 = 12
x= 84
300
The sum of a number and 12 is 4 more than 8
x + 12 = 12
300
x + 110 = 300
x = 190
300
x - 560 = 800
x = 1360
300
5x = 1555
x= 311
300
x/3 = 123
x= 369
400
Double a number is 10 more than 5
2x = 15
400
2x +250 = 1230
x = 490
400
x - 880 = 1250
x = 2130
400
7x = 2877
x=411
400
x/7 = 458
x=3206
500
Twice a number is 20 less than 40
2x = 20
500
3x + 1230 = 3000
x = 590
500
x -2770 = 3900
x = 1130
500
8x = 81640
x=10205
500
2x/11 = 250
x =1375