Question

246:(5×a -3×3+10:10-0×1)-(13×10-2×5×2)=13
a=?​

Answer 1

Răspuns:

Explicație pas cu pas:

246:(5×a -3×3+10:10-0×1)-(13×10-2×5×2)=13

246:(5×a -3×3+10:10-0×1) = 13 + (13×10-2×5×2) = 13 + 130 - 20 = 123

5×a -3×3+10:10-0×1 = 246 : 123 = 2

5a - 9 + 1 - 0 = 2

5a - 8 = 2

5a = 8 + 2 = 10

a = 10 : 5 = 2

Answer 2

Răspuns:

246:(5×a-3×3+10:10-0×1)-(13×10-2×5×2)=13

246:(5a-9+1-0)-(130-20)=13

246:(5a-8)-110=13

246/(5a-8)-110=13

246/(5a-8)=13+110

246/(5a-8)=123

246=123×(5a-8)

2=5a-8

-5a=-8-2

-5a=-10

a=2

Verific:

246:(5×2-3×3+10:10-0×1)-(13×10-2×5×2)=13

246:(10-9+1-0)-(130-20)=13

246:2-110=13

123-110=13

13=13 => (corect)