Решите уравнение 1)x+(90+30)=180 2) (x+60)*5=500 (x+90)+30=180 5*x+300=500

<span>x+(90+30)=180
</span><span>x+120=180
х=180-120
х=60

</span><span>(x+60)*5=500
х+60=500/5
х+60=100
х=100-60
х=40

</span><span>(x+90)+30=180
</span><span>x+90+30=180
х+120=180
х=180-120
х=60

</span><span>5*x+300=500
5х=500-300
5х=200
х=200/5
х=40</span>