-2x -- 4 + 5x = 8
x = 5?
-2 * 5 -- 4 + 5 * 5
-10 -- 4 + 5 * 5
-14 + 5 * 5
-14 + 25
11.
x = 3?
-2 * 3 -- 4 + 5 * 3
-5 -- 4 + 5 * 3
-9 + 5 * 3
-9 + 15
6.
x = 4.75?
-2 * 4.75 -- 4 + 5 * 4.75
-9.5 -- 4 + 5 * 4.75
-13.5 + 5 * 4.75
-13.5 + 23.75
10.25.
x = 4..?
-2 * 4 -- 4 + 5 * 4
-8 -- 4 + 5 * 4
-12 + 5 * 4
-12 + 20
8
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After all this, x = 4.
