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Rezolvati
a)2 (x+3)+17=59
b)7 (x-2)+9=44


Răspuns :

a)2 (×+3)+17=59
2×+6=59-17
2×+6= 42
2×=42-6
2×= 36
×=36÷2
×=18

b)7 (×-2)+9=44
7×-14=44-9
7×-14= 35
7×=35+14
7×= 49
×=49÷7
×=7