Answer:
a ) x + 3 = 11, x = 8
b) 3x = 9, x = 3
c) x - 7 = 7, x = 7
d) 3x = 3, x = 1
Explanation:
a) There is one green rectangle and 3 yellow triangles on one side and 11 yellow squares on the other side. They're on that thing where in order to balance each side has to be equal, so one green rectangle + 3 yellow squares = 11 yellow squares.
the green thing is x, the yellow thing is 1.
add them up, which makes the equation x + 3 = 11
subtract 3 from both sides
x = 8
You do the same process with each equation.
Hope this helps!