Spośród liczb -1, 1, 3 wybierz tę, która spełnia równanie: a) 2x - 3 = 3 b) 8x + 7 = 4x + 3 c) 3(1 - x) = 0 Z góry dzięki ;)
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a) 2x - 3 = 3 3
2 * 3 - 3 = 3
6 - 3 = 3
3 = 3
b)8x + 7 = 4x + 3 -1
8 * (-1) + 7 = 4 *(-1) + 3
-8 + 7 = -4 + 3
-1 = -1
c) 3(1 - x) = 0 1
3 (1 - 1) = 0
3 - 3 = 0
0 = 0