1. 77-(15+х)=13
45+х=64
Х=19
2. 30-х=42-21
30-х=21
Х=9
3.
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Answers & Comments
1. 77-(15+х)=13
45+х=64
Х=19
2. 30-х=42-21
30-х=21
Х=9
3.
77-45-x=13
32-x=13
-x=13-32
-x=-19
x=19
2)
30-x+21=42
51-x=42
-x=42-51
-x=-9
x=9
3)
34+x-23=69
11+x=69
x=69-11
x=58
4)
156-x-61=72
95-x=72
-x=72-95
-x=-23
x=23
5)
324-x-52=223
227-x=223
-x=223-272
-x=-49
x=49