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Sagot :
Answer:
B
Step-by-step explanation:
a)
2x + x + 5x -9 = -6 + 9x - x + 3
8x - 9 = 8x -3
8x - 8x = -3+9
0
Has no solution.
b)
10x -6x -4-1 = 7-12+2x+2x
4x - 5 = 4x - 5
0 = 0
therefore has infinite solutions.
c)
7x + 5 + 4 - 9x = x + 2 - 4 +8x
-2x + 9 = 9x -2
-11x = -11
x = 1
Soluble and has a solution.
d)
5x - 2x - 3 -9 = x -12 + 3x + 3x
3x -12 = 7x -12
-4x = 0
x = 0
Has a solution.
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