請問呢D代數題點做?

Solve the following equations.
(1) 6x-5=4x+3
6x - 4x = 3 + 5
2x = 8
x = 4
(2) 7m+15-2m=20-5m
7m-2m+5m = 20-15
10m = 5
m = 1/2
(3) 2(2k+3)-5=3(k+7)
4k+6-5=3k+21
4k-3k=21+5-6
k=20

E题张有X果D数调过去左边,当然,当左边调去右边(/右调左)时要调翻D正负数,即 ' + '变 ' - ', ' - '变' + '
(1) 6x-5=4x+3
6x-4x=3+5
2x=8
x=4

(2)7m+15-2m=20-5m
7m-2m+5m=2015
10m=5
m=0.5

E题都系张有X果D数调过去左边,但之前就乘走左个括号先,
如下题: 2(2k+3)-5
写成:2(2k)+2(3)-5 (E个系步骤,计数时唔洗写落去)
= 4k+6-5

(3)2(2k+3)-5=3(k+7)
4k+6-5=3k+21
4k-3k=21-6+5
k=15+5
k=20


希望帮到你~