Решите уравнения: х+(90+30)=180,(х+90)+30=180,(х+60)*5=500,5*х+300=500 - вопрос №9030180903018060550053005002626544 от nastya05112 09.03.2023 10:09

Question

Математика: Решите уравнения: х+(90+30)=180,(х+90)+30=180,(х+60)*5=500,5*х+300=500

nastya05112 · Answer

х+(90+30)=180x + 120 = 180x = 180 - 120x = 6060 + (90 + 30) = 180180 = 180﻿(x + 90) + 30 = 180x﻿ = 180 - 90 - 30x = 60﻿(60 + 90) + 30 = 180180 = 180﻿(x + 60) *5 = 5005x + 300 = 5005x = 500 - 3005x = 200x = 200 : 5x = 40(40 + 60) * 5 = 500500 = 500﻿5*x + 300 = 5005﻿x + 300 = 5005x = 500 - 3005x = 200x = 200 :5 x = 405 * 40 + 300 = 500500=500...