Решите уравнения:
1. 0,4(х+8)-4,7=0,3(х-3)
2. (9х-7)-(6+7х)=5
3. 0,8(3+х)=23,7+0,7(х-5)
1. 0,4(х+8)-4,7=0,3(х-3)
2. (9х-7)-(6+7х)=5
3. 0,8(3+х)=23,7+0,7(х-5)
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Answers & Comments
0,1x = -0,9 + 4,7 - 3,2
0,1x = 0,6
x = 6
2) 9x - 7 - 6 -7x = 5
2x = 5 + 7 + 6
2x = 18
x = 9
3) 2,4 + 0,8x = 23,7 + 0,7x - 3,5
0,1x = 23,7 - 3,5 - 2,4
0,1x = 17,8
x = 17,8 / 0,1
x = 178