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rozwiąż równania
2 x+1=7- x
2x + x = 7 - 1
3x = 6
x = 2
18-7=-2-57
a gdzie jest x?
np
18x - 7 = -2x - 57
18x + 2x = -57 + 7
20x = -50
x = -50/20 = -5/2 = -2 1/2
0,8 z+6=z+24
0,8z - z = 24 - 6
-0,2z = 18
z = -90
a-4=2/3 a-8
a - 2/3a = -8 + 4
1/3a = -4 I *3
a = -12
6 4/5=1/7 b-1/5
1/7b = 6 4/5 + 1/5
1/7b = 7 I *7
b = 49
2.
wymyśl 5 przykładów z rozwiązywania równań
2x + 15 = 3x + 25
1/2x + 13 = 1 1/2x - 14
1/5x - 23 = 3 4/5x - 12
14 3/7x + 35 = 3 3/7x + 12
-2 3/4x - 4 1/5 = 4 1/4x - 22 1/5