1,3(t-0,6)=1,8t; 50-7е-16+3е-16; 0,6(-2у+3)-0,4(9-у)=-0,3(у-9).

Question

1,3(t-0,6)=1,8t; 50-7е-16+3е-16; 0,6(-2у+3)-0,4(9-у)=-0,3(у-9).

Answer 1

1)1,3t-0.78=1,8t;
1,3t-1,8t=0,78;

-0,5t=0,78;

t=0,78/(-0,5);

t=1,56.

2)проверь написаное