could someone please help solve by substitution 8x-3y=-88
4x+48=y
8 x - 3 y = -88
8 x - 3 (4 x + 48) = -88
8 x - 12 x - 144 = -88
-4 x = 56
x = -14
then get y
x 30 sec or .5 min
y 60 sec or 1 min
x + y = 14
.5 x + y = 11
---------------- subtract
.5 x + 0 y = 3
x = 6
y = 14-x = 8
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check
6*.5 + 8 = 3+8 = 11
Post new questions as new questions, not under your old one. Otherwise they will be missed.
Sorry, Damon. I removed her question here while you were answering it. I've reposted your answer above.
Sure, I can help you solve the system of equations through substitution.
Step 1: Solve one of the equations for one variable.
Let's solve the second equation for y:
4x + 48 = y
Step 2: Substitute the expression from step 1 into the other equation.
Replace y in the first equation with 4x + 48:
8x - 3(4x + 48) = -88
Step 3: Simplify and solve for x.
8x - 12x - 144 = -88
-4x - 144 = -88
-4x = 56
x = -14
Step 4: Substitute the value of x back into one of the original equations to find y.
Using the second equation:
4x + 48 = y
4(-14) + 48 = y
-56 + 48 = y
y = -8
Therefore, the solution to the system of equations is x = -14 and y = -8.