Реши уравнения.х÷9=600:100.28÷х=400÷100. х-(25+19)=36.
Х÷9=600÷100 Х÷9=6 Х=9×6 Х=54 28÷х=400÷100 28÷х=4 х=28÷4 х=7 Х-(25+19)=36 Х-44=36 Х=36+44 Х=80