Answer:
a) x = -10
b) x = 7
Step-by-step explanation:
a)
2(x + 3) = x - 4
2x + 6 = x - 4
2x - x = -4 - 6
x = -10
b)
4(5x - 2) = 2(9x + 3)
20x - 8 = 18x + 6
20x - 18x = 6 + 8
2x = 14
x = 7
Y: x-1 that is the answer. I think so.
Let
be the side of the triangle and
be the side of the square.
Let
be the perimeter of the triangle and
be the perimeter of the square.
We have the following relationship:

Which finally implies

.08
.21
.40
is the right answer