X + 2x + 3 + 4 = 5x +7 +6x + 8

x = -1

Step-by-step explanation:

combine like terms on both sides  (like terms refers to the variable, x in this case) so

3x + 7 = 11x + 15

then get x terms to one side and non-x terms to the other

this gives you: 7 - 15 = 11x - 3x

                             -8 = 8x

dived both sides by 8 (since its the constant with x) which gives you

x = -1

hope I could help ( I messed up at first but I fixed it)

b) 36

step-by-step explanation:

18 times 2 is 36

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

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