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a) 3 + (8+x)/2 = 2x + 13 |*2
6 + 8 + x = 4x + 26
14 + x = 4x + 26
-3x = 12
x = -4
b) 2x - (3x-7)/4 = x + 1 |*4
8x - 3x + 7 = 4x + 4
5x + 7 = 4x + 4
x = -3
c) 5 - (x+5)/3 = 2 -x |*3
15 - x - 5 = 6 - 3x
10 - x = 6 - 3x
2x = -4
x= -2
d) 3x + (4 - x) / 5 = x - 1 |*5
15x + 4 - x = 5x - 5
9x = -9
x = -1
zadanie w załączniku
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a) 3 + (8+x)/2 = 2x + 13 |*2
6 + 8 + x = 4x + 26
14 + x = 4x + 26
-3x = 12
x = -4
b) 2x - (3x-7)/4 = x + 1 |*4
8x - 3x + 7 = 4x + 4
5x + 7 = 4x + 4
x = -3
c) 5 - (x+5)/3 = 2 -x |*3
15 - x - 5 = 6 - 3x
10 - x = 6 - 3x
2x = -4
x= -2
d) 3x + (4 - x) / 5 = x - 1 |*5
15x + 4 - x = 5x - 5
9x = -9
x = -1
zadanie w załączniku