1.
a) suma liczb "b" i 2
b) różnica liczb "y" i 6
2.
a) a²-7
b) 2÷b lub 2/b
3.
a) 2a+5 dla a = 6
2·6+5 = 12+5 = 17
b) a²-2b dla a = 3, b = 1
3²-2·1 = 9-2 = 7
4.
2·2+2·a = 4+2a
5.
2a-1 3/4 = 2 1/2
2a = 2 1/2+1 3/4
2a = 5/2+7/4
2a = 10/4+7/4
2a = 17/4 /:2
a = 17/4·1/2
a = 17/8
a = 2 1/8
6.
x - kwota
1/2x·4 = 1
4/2x = 1
2x = 1 /:2
x = 1/2
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1.
a) suma liczb "b" i 2
b) różnica liczb "y" i 6
2.
a) a²-7
b) 2÷b lub 2/b
3.
a) 2a+5 dla a = 6
2·6+5 = 12+5 = 17
b) a²-2b dla a = 3, b = 1
3²-2·1 = 9-2 = 7
4.
2·2+2·a = 4+2a
5.
2a-1 3/4 = 2 1/2
2a = 2 1/2+1 3/4
2a = 5/2+7/4
2a = 10/4+7/4
2a = 17/4 /:2
a = 17/4·1/2
a = 17/8
a = 2 1/8
6.
x - kwota
1/2x·4 = 1
4/2x = 1
2x = 1 /:2
x = 1/2