Question

daca x=3 si y+z=10, calculeaza: a) 7*x+7*y+7*z; b) 17*x+17y+17*z; c) 5*x+10*y+10*z; d) 100*x-(9*y+9*z)

Answer 1

7x+7y+7z=7x+7(y+z)=7x3+7x10=21+70=91
b).17x+17(y+z)=17x3+17x10=51+170=221
c). 5x+10(y+z)=5x3+10x10=15+100=115
d).100x-9(y+z)=100x3-9x10=300-90=210