Выражения 3(х+5)=3х+15 (3+5)х=3х+5х (7+х)*5=7*5+8*5 - вопрос №64826443531535357575852424245353 от ffghh1gfdd 21.06.2020 11:50

Question

Математика: Выражения 3(х+5)=3х+15 (3+5)х=3х+5х (7+х)*5=7*5+8*5 (х+2)*4=2*4+2*4 (5-3)х=5х-3х (5-3)х=5х-3*2

ffghh1gfdd · Answer

3(х+5)=3х+153х+15=3х+153х-3х=15-150=0(3+5)х=3х+5х8х=8х8х-8х=00=0(7+х)×5=7×5+8×535+5х=35+405х=75-355х=40х=8(х+2)×4=2×4+2×44х+8=8+84х=16-84х=8х=2(5-3)х=5х-3х2х=2х2х-2х=00=0(5-3)х=5х-3×22х-5х=-6-3х=-6х=2...