Question

426-(460-10 x a)=366

[(58 x a-80):25] x 64=1280

Vă rog! Dau coroană!

Answer 1

1) 426-(460-10xa) = 366
460 - 10xa = 426-366
460 - 10xa = 60
10xa = 460-60
10xa = 400
a = 400:10
a = 40

2) [(58xa-80):25] x 64 = 1280
    (58xa - 80):25 = 1280:64
(58xa - 80):25 = 20
58xa - 80 = 20x25
58xa - 80 = 500
58xa = 500 + 80
58xa = 580
a = 580:58
a = 10

Answer 2

426-(460-10 x a)=366
460 - 10 × a = 426 - 366
460 - 10 × a = 60
10 × a = 460 - 60
10 × a = 400
a = 400 : 10
a = 40 

[(58 x a-80):25] x 64=1280
(58 × a - 80 ) : 25 = 1 280 : 64
(58 × a - 80 ) : 25 = 20
58 × a - 80 = 20 × 25
58 × a - 80 = 500
58 × a = 500 + 80
a = 580 : 58 
a = 10