Question

50%x=200 x+10%x=330

Answer 1

50%x=200

0.5x=200

x=400

x+10%x=330

1.1x=3.0

x=300

5分之x=480

x=480×5

x=2400

110x-10x=40

100x=40

x=0.4

x-20%x=64

0.8x=64

x=80

75%x-25%x=75

0.5x=75

x=150