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[2+3x(20-2x5)+a] x 10 =560


Va rog repede!!!
Dau coroana


Răspuns :

Răspuns:

[ 2 + 3 x ( 20 - 2 x 5 ) + a ] x 10 = 560

= [ 2 + 3 x ( 20 - 10 ) + a ] x 10 = 560

= ( 2 + 3 x 10 + a ) x 10 = 560

= ( 2 + 30 + a ) x 10 = 560

= ( 32 + a ) x 10 = 560

= 320 + 10a = 560

= 10a = 560 - 320

= 10a = 240

= 24