what is 8/21 × x + 4/5 ÷9/5=-1
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8/2 × x + 4/5 ÷ 9/5 = -1
= 4x + 4/5 × 5/9 = -1
= 4x + 4 × 1/9 = -1
= 4x + 4/9= -1
= 9 × 4x + 9 × 4/9 = -9 × 1
= 36x + 4 = -9
= 36x = - 9 - 4
= 36x = -13
= x = -13/36
= x = 0.361111
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