−7 + 3(r − 3) = 2(r − 1) please show work

r=11

Step-by-step explanation:

3r-13=2r-2

3r-13+13=2r-2+13

3r=2r+11

3r-2r=2r+11-2r

r=11

step-by-step explanation:

just plug in each number for x and see which ones work and don't

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.