1.3x + 3 = 8
1.3x + 8 - 3 = 5
x = 5 ÷ 1.3 = 3.846 (3dp)
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5x-13x+6=0 5x-13x=-6 -8x=-6 -8x/-8=-6/-8 x = 3/4
Given 6x + (7x-8) = -5 6x + 7x - 8 = -5 ==> 13x = 3 therefore, x = 3/13
x = 3Solution:3x + -1 = 83x = 8 + 13x = 9x = 9/3x = 3Check:3(3) + -1 = 89 + -1 = 88 = 8
Yes, -8 plus plus 3 equals -5. The "plus plus" is equivalent to a positive sign, so -8 plus (+3) equals -5.
89