решите уравнение:
1. х/2 + х/3 = 4
2. 4- х/7 = х/9
3. 3(х - 3) = х + 2(х + 5)
4.-4(х + 2) + 3(х - 1) -2 = 4(х - 2) + 9
1. х/2 + х/3 = 4
2. 4- х/7 = х/9
3. 3(х - 3) = х + 2(х + 5)
4.-4(х + 2) + 3(х - 1) -2 = 4(х - 2) + 9
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Verified answer
1)x/2+x/3=43x+2x/6=4
5x/6=4
5x=6×4
5x=24
x=24/5=4 4/5
2)4-x/7=x/9
-x/7-x/9=-4
x/7+x/9=4
9x+7x/63=4
16x/63=4
16x=252
x=15 3/4
-4(x+2)+3(x-1)-2=4(x-2)+9
-4x-8+3x-3-2=4x-8+9
-4x+3x-4x=-8+9+2+3+8
-5x=14
x=-14/5=-2 4/5