1.(x+3)*2=18 2.(x-7)*4=64 3.(x-9)/2=25 4.(x+5)/7=8 - вопрос №4288091132182746439225457851168468375 от RBR13 11.06.2020 11:33

Question

Математика: 1.(x+3)*2=18 2.(x-7)*4=64 3.(x-9)/2=25 4.(x+5)/7=8 5.(x-11)*6=84 6.(8x+3)/7=5

RBR13 · Answer

1) (х+3)*2=18х+3=18:2х+3=9х=9-3х=62)(х-7)*4=64х-7=64:4х-7=16х=16+7х=233)(х-9):2=25х-9=25*2х-9=50х=50+9х=594)(х+5):7=8х+5=8*7х+5=56х=56-5х=515)(х-11)*6=84х-11=84:6х-11=14х=14+11х=256)(8х+3):7=58х+3=5*78х+3=358х=35-38х=32х=32:8х=4...