what is the solution to 5-t=23
a:t=28
b:t=18
c:t=-18
d:t=-23
what is the value of b if -7+b=-8
a:b=15
b:b=1
c:b+-1
D:b=-15
I think c and a
c
but not a: -7+15 = +8
To find the solution to an equation, you need to isolate the variable (in this case, "t" and "b") on one side of the equation by performing the same operation on both sides of the equation.
1. For the equation 5 - t = 23, you want to isolate "t".
To do this, subtract 5 from both sides:
5 - t - 5 = 23 - 5
This simplifies to: -t = 18
To solve for "t", multiply both sides by -1 to get the positive value:
-t * -1 = 18 * -1
This gives: t = -18
Therefore, the correct answer is c: t = -18.
2. For the equation -7 + b = -8, you want to isolate "b".
To do this, add 7 to both sides:
-7 + b + 7 = -8 + 7
This simplifies to: b = -1
Therefore, the correct answer is b: b = -1.