Question

упростите выражение
2(х+3)+5(х+1)
9(7+у)+8(6+у)
4(3х+23)+7(6+5х)
12(9+8у)+3(11+6у)

Answer 1

2(х+3)+5(х+1)=2х+6+5х+5=7х+11
9(7+у)+8(6+у)=63+9у+48+8у=111+17у
4(3х+23)+7(6+5х)=12х+92+42+35х=47х+134
12(9+8у)+3(11+6у)=108+96у+33+18у=141+114у