Question

stiind ca x=23 și y + z=41, calculati: d) 4y +4z - 5z
e) 7z +7y - 9x
f) 9y +9z - 7x.
VA ROG AJUTATI-MA E URGENT!​

Answer 1

d) 4y+4z-5z =

4(y+z) -5z=

4× 41 - 5z =

164- 5z=

5z= 164 => z= 164/5

e) 7z+7y-9x =

7(z+y) - 9× 23=

7 × 41 - 207=

287- 207 = 80

f) 9y+9z - 7x =

9(y+z) - 7×23=

9 × 41 - 161=

369-161 = 208