Question

Daca x=3 si y+z=10 , calculeaza
a) 7×x+7×y+7×z
b) 17×x+17×y+17×z-10
c) 5×x+10×y+10×z
d) 100×x-(9×y+9×z)
ajutor urgent!!!

Answer 1

a)7*x=21 pt ca x = 3. 7*y+7*z= 7*10=70 pt ca y+z=10-------> rezultat =91
b)17*3=51 17*y+17*z=170. 170-10=160. rezultat =211
c)5*3=15. 10*y+10*z=10*10=100. 100+15=115
d)100*3=300. 9*y+9*z=9*10=90. 300-90=210