Question

Решите уравнение а)(21+x)-34=11 б) 4x-(12-25+3x)=87 в)5x-(7+8+4x)=56 РЕШИТЕЕЕЕЕЕЕЕЕЕ ПЖЖЖЖЖЖ

Answer 1

$a)(21+x)-34=11 \\ 21 + x - 34 = 11\\ x=11-21+34\\ x =24 \ \------\ 21+24-34 \------\ \ boxed{boldsymbol{OTBET:x=24}}$





$b) 4x-(12-25+3x)=87 \ \ 4x-12+25-3x = 87\ \ 4x-3x=87+12-25 \ \ 1x = 74 \ \ x = 74 \\-----\296-(12-25+222) = 296-209 = 87\-----\\boxed{boldsymbol{OTBET:x=87}}$





$B)5x-(7+8+4x)=56 \ \ 5x-7-8-4x=56\\ 5x-4x=56+7+8\\1x=71\\x=71\\--- -\355-7-8+284 = 340-284 = 56\ ----\ \ boxed{boldsymbol{OTBET:x=71}}$