Question

Daca x=3 si y+z=10,calculează:

a) 7×x+7×y+7×z
b) 17×x+17×z-10
c) 5×x+10×y+10×z
d) 100×x-(9×y+9×z)

Dau coroană

Answer 1

7×x+7×y+7×z=7×3+7×6+7×4=21+42+28=101
17×x+17×z-10=17×3+17×4-10=51+68-10=109
5×x+10×y+10×z=5×3+10×6+10×4=15+60+40=115
100×x-(9×y+9×z)=100×3-(9×6+9×4)=300-(54+36)=300-90=210
sper ca te-am ajutat!!!