vă rog dau coroana pe toate
Răspunsuri la întrebare
Răspuns:
Explicație pas cu pas:
a × 5 - 7×4 = 17
a × 5 - 28 = 17
a × 5 = 17 + 28
a × 5 = 45
a = 45 : 5
a = 9
Verific 9×5 - 7×4 = 45 - 28 = 17
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a × 3 + 9×6 = 75
a × 3 + 54 = 75
a × 3 = 75 - 54
a × 3 = 21
a = 21 : 3
a = 7
V: 7×3 + 9×6 = 21 + 54 = 75
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a × 6 - 8 × 4 = 16
a × 6 - 32 = 16
a × 6 = 16 + 32
a × 6 = 48
a = 48 : 6
a = 8
V: 8×6 - 8×4 = 48 - 32 = 16
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8 × a - 9 × 2 = 38
8 × a - 18 = 38
8 × a = 38 + 18
8 × a = 56
a = 56 : 8
a = 7
V: 8 × 7 - 9 × 2 = 56 - 18 = 38
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7 × a + 5 × 8 = 89
7 × a + 40 = 89
7 × a = 89 - 40
7 × a = 49
a = 49 : 7
a = 7
V: 7 × 7 + 5×8 = 49 + 40 = 89
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4 × a - 9 × 3 = 1
4 × a - 27 = 1
4 × a = 1 + 27
4 × a = 28
a = 28 : 4
a = 7
V: 4 × 7 - 9 × 3 = 28 - 27 = 1