The answer is 28
bc 3+(5x5) = 3+25 and 3+25 is 28
A-b=21
5a-2b=18
We can use substitution here. Take the first equation and solve for A. (Picking this one because it's easy)
a = 21+b
Plugin to the second equation:5(21+b)-2b=18
Simplify: 105 + 5b - 2b = 18
Simplify: 105 + 3b = 18
Subtract both sides: 3b = 18-105
Simplify: 3b = -87
Divide: b = -29
Plug back into the first: a=21+b
a = 21 - 29
a = -8
Option D
the answer i got is in the image below
Answer:
x= -4
graph with a closed circle over the intended number
Step-by-step explanation:
These inequalities are basically the same steps as equation.
Step 1: subtract 7 from the 19 on the other side of the equation, this equals 12
Step 2: divide -3 by 12 this equals -4
For these equations, you have to inverse the operations (i.e + to -). that is why you subtract and divide. (-3x) is the same as multiplication. The coefficient and variable are being multiplied.
Answer a) 7/2 b) 6/6 c) 6/12 d) 27/35 e) 28/35
