Question

a) -2x=-14
б) -2/5x=3/10
в) 8y-(7y-142)=51

Answer 1

а) -2x=-14
x=7
б) -2/5x=3/10
-2/5x=0,3
5x=0,3/-2
5x=-0,006
x=-0,006/5
x=-0,0003
в) 8y-(7y-142)=51
8y-7y+142=51
y+142=51
y=51-142
y=-91