You subtract 11 from both sides and r equals negative 7. See...
r+11=3
-11 -11
r=7
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a = 4
2x + 3 + 3x = x + 11 5x + 3 = x + 11 4x + 3 = 11 4x = 8 x = (8/4) x = 2
x + 3 = 11 (to solve for x, subtract 3 fromeach side of the equation) x + 3 - 3 = 11 - 3 (then simplify) x = 8 (this is the answer)
3+d=11 d would have to be the number added to 3 that results in the answer 11. I can think of one: 8. Are there any others?
m= -3