Answer: 4x + 8 = 12
Step-by-step explanation: U combine 3x + 4x - 3x = 4x and just add 8 add 12 to the equation
The large triangle and the smaller one are similar. Comparing long sides to short ones, we get
.. (30 mm)/(21 mm) = (14 mm +x)/(14 mm)
.. (14 mm)*10/7 = 14 mm +x
.. (14 mm)*(10/7 -1) = x
.. (14 mm)*(3/7) = x = 6 mm
The value of x is 6 mm.
X = 0 y =-1 because you have to have to find numbers to replace x & y.