Substitute 5 for x and solve:
8 + 6(5) = ?
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8+6x = ? 8+6*5 = ? 8+30 = ?
6x-4+7=-5 6x+3=-5 6x=-8 x=-8/6 = -4/3
6x = 32 - 4y and 4y - 8 = 6x so 32 - 4y = 4y - 8 ie 40 = 8y so y = 5 and x = 2
Given 6x + (7x-8) = -5 6x + 7x - 8 = -5 ==> 13x = 3 therefore, x = 3/13
6x+4=3x+12 => 6x-3x=12-4 => 3x=8 => x=8/3=2.666...