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-1 =2x /2
-0,5 =x
b) y - 3 = 9 - y
2y =12 /2
y =6
c) 1/2z + 6 = z - 1
7 =1/2z /1/2
1/14 =z
-2x=1/:(-2)
x= -0,5
y - 3 = 9 - y
2y=12/:2
y = 6
1/2z + 6 = z - 1
1/2z= - 7/*2
z = - 14
Mam nadzieję ze pomogłam
3x - 5x = 1
-2x = 1 /: (-2)
x = -1/2
b) y - 3 = 9 - y
y + y = 9 + 3
2y = 12 / :2
y = 6
c) 1/2z + 6 = z - 1
1/2z - z = -1 - 6
- 1/2z = -7 / : (- 1/2)
z = 14
[ myślę że pomogłam :)) ]