Question

va rog sa ma ajutati daca sunteti buni la matematica la ecuati cu semne diferite ajutati ma dar daca nu stii nu scrie ca voi raporta ca abuz
ecuatile sunt mai jos
1)6(5x-2)+12≤7x-3.
2)4(7x-3)+15≥10x-13.
3)7(8x-5)11≥5x-12.
4)8(3x-7)+14≤9x-10.
dau si coroana pentru cel mai bun raspuns astept raspunsuri

Answer 1

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Answer 2

1)6(5x-2)+12≤7x-3
30x-12+12≤7x-3
30x-7x≤-3
23x≤-3
x≤-3/23
x∈(-α, -3/23]

2)4(7x-3)+15≥10x-13
28x-12+15≥10x-13
28x-10x≥-13+12-15
18x≥-16
x≥-16/18
x≥-8/9
x∈[-8/9,+α)

3)7(8x-5)11≥5x-12
(56x-35)·11≥5x-12
616x-385≥5x-12
616x-5x≥-12+385
611x≥397
x≥397/611
x∈[397/611,+α)
nu stiu daca e scris bine ex. de catre tine

4)8(3x-7)+14≤9x-10
24x-56+14≤9x-10
24x-9x≤-10+56-14
15x≤32
x≤32/15
x∈(-α,32/15]