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Materi : Kesebangunan
Kelas : IX
Penyelesaian :

• x/10 = 18/5
5x = 180
x = 180 ÷ 5
x = 36.

• y/5+y = 15/18
18y = 75 + 15y
18y - 15y = 75
3y = 75
y = 75 ÷ 3
y = 25

• z+30/30 = 18/15
15z + 450 = 540
15z = 540 - 450
15z = 90
z = 90 ÷ 15
z = 6.

x/10 = 5+y/y = z+30/30 = 18/15

• x/10 = 18/15
5x = 6 . 10
x = 6 . 10 / 5
x = 12

• 18/15 = 5+y/y
6y = 25+5y
6y-5y = 25
y = 25

• 18/15 = z+30/30
5z+150 = 180
5z = 180-150
5z = 30
z = 6

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