中一分數代數方程

1.k/30+5=k/10
k+150=3k
150=2k
k=75
2.y/6=6-4y/3
y=36-8y
9y=36
y=4

I try to write all the steps so you can understand one by one.

1) You may do in the way below ( most safety one )

30( k/30 + 5 ) = 30 ( k/10 )

30( k/30 ) + 30( 5 ) = 30 ( k/10 )

k + 150 = 3k

150 = 3k - k

150 = 2k

75 = k

k = 75
=====


2) y/6=6-4y/3

6( y/6 ) = 6( 6 - 4y/3 )

6( y/6 ) = 6( 6 ) - 6( 4y/3 )

y = 36 - 8y

y + 8y = 36

9y = 36

y = 4
====

1.k/30+5=k/10
↓2邊一齊成30
k+150=3k
↓將個k移去右手面
150=2k
k=150/2
k=75

2.y/6=6-4y/3
↓2邊一齊成6
y=36-8y
↓將8y移去左手面
9y=36
y=36/9
y=4

1.k/30+5=k/10
k+150=3k
150=2k
k=75

2.y/6=6-4y/3
y=36-8y
9y=36
y=4