Answer:
x ≈ 2.55
Step-by-step explanation:
Since the triangles are congruent then DE ≡ AB , that is
DE = AB
76x - 7 = x + 184 ( subtract x from both sides )
75x - 7 = 184 ( add 7 to both sides )
75x = 191 ( divide both sides by 75 )
x ≈ 2.55 ( to the nearest hundredth )
15 x 6t = 81
Multiply 15 by 6
90t = 81
Divide both sides by 90
t = 81/90
Because you increased by the percent THEN decreased by a different percent, you subtract both percents because they are of like terms. So you do 45%-20% which equals 25% which is what’s left after dropping the total.