Question

Afla numarul necunoscut si expresiile:
{[( A+2) x 2+2] x 2+2} x 2+2=30
187-{220 x [(11 x 9-735:15):25+4]:B - 53}=20

Answer 1

{[( A+2) x 2+2] x 2+2} x 2+2=30
{[( A+2) x 2+2] x 2+2} x 2=30-2
{[( A+2) x 2+2] x 2+2} x 2=28
{[( A+2) x 2+2] x 2+2} =28:2
[( A+2) x 2+2] x 2+2=14
[( A+2) x 2+2] x 2=14-2
[( A+2) x 2+2] x 2=12
( A+2) x 2+2=12:2
( A+2) x 2+2=6
( A+2) x 2=6-4
( A+2) x 2=2
A+2=2:2
A+2=1
A=1-2
A=-1



187-{220 x [(11 x 9-735:15):25+4]:B - 53}=20

220 x [(99-49):25+4]:B - 53=187-20

220 x (50:25+4):B - 53=167


220 x (2+4):B =167+53

220 x 6:B =220

6:B=220:220

6:B=1

B=6x1

B=6