Решите уравненияа)6.7х+3х+63.5=500б)(2.1-0.7х):0.48=3.5

Question

Решите уравнения
а)6.7х+3х+63.5=500
б)(2.1-0.7х):0.48=3.5

Answer 1

А. 9.7х=500-63,5
9.7х=436.5
х=436.5:9.7
х=45
б. 2.1-0.7х=3.5*0.48
2.1-0.7х=1.68
-0.7х=1.68-2.1
0.7x=0.42
x=0.42/0.7
X=6