b=12
15+b = 23 Subtract 15 from both sides b = 8
-8 + b = 4 add 8 to both sides: b = 12
the answer is a
4b
19
12
A plus b 4 can be assumed that mathematically, a = +4.
b=12
4b+3=15 4b=15-3 b=(15-3)/4 b=3
Symmetry, which states that if A = B then B = A Put A = 4 and B = x + y
a = 11 and b = 5.
a = 6b = 9a + b = 6 + 9 = 15
15+b = 23 Subtract 15 from both sides b = 8
ax + b = 15 or ax + b = -15
b + 4 = 7.7 b = 7.7 - 4 b = 3.7
4b + 3 = 15 First, Subtract 3 from both sides. -3 -3 4b = 12 Then, divide by 4 to get b by itself. 4 4 b = 3