divinasebastian
divinasebastian
30-09-2016
Mathematics
contestada
What is 1/2(7z+4)+1/5(5z-15
Respuesta :
vivian61
vivian61
30-09-2016
1/2 is the same as 2 and 1/5 is the same as 5
so it will go like this
2(7z+4)+5(5z-15)
14z+6- 25z+75
collect like terms
=14z+25z-75+6
39z - 81
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