-4b+2 = 18
-4b = 18-2
-4b = 16
b = -4
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The answer to 6b plus 7 times 5-4b plus 1 equals 38. This is taught in math.
6 + 12 - 5 = 13
a=2b 4b=6c becomes 2b=3c a=3c
2a + 4b - 52a + 4b - 52a + 4b - 52a + 4b - 5
1a+3b 2a+4b=3a +7b