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4b.
4b
b+b+b+c+c+c+c =3b+4c
b + b + b + c + c + c + c = 3b + 4c
a-b+a-b+2b+a = 4a
3b
b + a + b - a = 2b
B
It is: b+b+b = 3b
The expression "b plus b plus b plus b" can be simplified by combining like terms. Since all the terms are the same (b), we can add them together. Adding b four times is the same as multiplying b by 4. Therefore, "b plus b plus b plus b" equals 4b.
b + b + b + 7 = 223b + 7 = 223b = 15b = 5
Water plus antacid pills are base. You can test it on litmus paper.