Question

Решите уравнения а)6,7х+3х+63,5=500 б)(2,1-0,7х):0,48=3,5

Answer 1

6,7х+3х+63,5=500, 9х+63,5=500, 9х=500-63,5, 9х=436,5, х=436,5/9 х=48,5. Б) (2,1-0,7х):0,48=3,5, 2,1-0,7х=3,5*0,48, 2,1-0,7х=1,68, 0,7х=2,1-1,68, 0,7х=0,42, х=0,42/0,7, х=0,6.

Answer 2

х=0.6...................................................