Answer:
25 buttons
Step-by-step explanation:
Lia as 86 buttons
Matt has unknown number of buttons
Lia gives Matt unknown number (g) of buttons
Lia now has 61 buttons
Let n represent the number of buttons Lia gave= ???
Let b represent the buttons Lia originally collected= 86
Let g represent how much Lia has now= 61
1. Plug numbers in and make the algebraic expression
[tex]86-???=61[/tex]
In algebraic form...
b-g will = n = b-g=n
b is 86
86
g is 61
86-61
So let us do this subtraction
2. Subtract
86-61
6-1=5
8-6=2
Multiply 2 by 10 because it is in the tens place
(2*10)+5
20+5
25+61=86
So
Lia had 86 buttons
She gave away ???
Now she has 61
How much did she give away...
25 buttons!
3. Complete the expression
[tex]86-???=61\\86-25=61\\25+61=86\\\\[/tex]
Hope this helps you!
Have a good evening!
