1. x + 3x = 180; x = 45; 180 - 45 = 135. Ответ: 135 и 45.
2. x + (x + 20) = 90; 2x = 70; x = 35; x + 20 = 55; Ответ: 35 и 55.
3. 8+7=15; 180/15 = 12; 12*8 = 96; 96 - 90 = 6; Ответ: 6.
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Answers & Comments
1. x + 3x = 180; x = 45; 180 - 45 = 135. Ответ: 135 и 45.
2. x + (x + 20) = 90; 2x = 70; x = 35; x + 20 = 55; Ответ: 35 и 55.
3. 8+7=15; 180/15 = 12; 12*8 = 96; 96 - 90 = 6; Ответ: 6.