Question

812:(63:9)x8-[(250x2+3xa)-13x12]+716:4=463

Answer 1

812:(63:9)x8-[(250x2+3xa)-13x12]+716:4=463
812:7x8-[(500-3xa)-156]+179=463
116x8-(500-3xa-156]=463-179
928-500+3xa+156=284
428+3xa+156=284
584+3xa=284
3xa=-300
a=-100

Answer 2

Răspuns

100 ;

Explicație pas cu pas:

812:(63:9)x8-[(250x2+3a)-13x12]+716:4 = 463 ;

812:7x8-[(500+3a)-156]+179 = 463 ;

116x8-(500+3a)+156 = 463-179 = 284 ;

928-500-3a = 284-156 = 128 ;

3a = 928-500-128 = 300 ;

a = 300:3 = 100 ;