Ella simplifies (3b+4r)+ (-2b-r) and says the result is b+ 5r. what error did ella make?

Elsa's error was adding (4r+r) instead of subtracting (4r-r)

Step-by-step explanation:

we have

step 1

Eliminate the parenthesis

step 2

Group terms that contain the same variable

step 3

Combine like terms

therefore

Elsa's error was adding (4r+r) instead of subtracting (4r-r)

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

(23*2)-12=x     x=34

step-by-step explanation: