Simplify expression 1) 0.57y+42.39y+49.43y+6.02y+8.61y 2) 3,9•4,4a-3,4a+3,9•5,6a-5,6a

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1) 0.57y+42.39y+49.43y+6.02y+8.61y = 106.12y 0.57y + 49.43y = 50y 42.39y + 8.61y = 50.1y 50.1y + 6.02y = 56.12y 50y + 56.12y = 106.12y 2) 3,9•4,4a-3,4a+3,9•5,6a-5,6a = 30a 3,9•4,4a = 17,16a 3,9 ·5,6a = 21.84a 17.16a - 3.4a = 13.76a 13.76a + 21.84a = 35.6a 35.6a - 5.6a = 30a
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Answer add