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6x = 90⁰
x = 15⁰
b) 4x+6x = 90⁰
10x = 90⁰
x = 9⁰
c) 2x+5x+2x = 90⁰
9x = 90⁰
x = 10⁰
d) 10x+15x+20x = 90⁰
45x = 90⁰
x = 2⁰
a. 90⁰ = 2x⁰ + 3x⁰ + x⁰
90⁰ = 6x⁰
15⁰ = x
b. 90⁰ = 6x⁰ + 14x⁰
90⁰ = 20x⁰
4,5⁰ = x
c. 90⁰ = 2x⁰ + 5x⁰ + 2x⁰
90⁰ = 9x⁰
10⁰ = x
d. 90⁰ = 10x⁰ + 15x⁰ + 20⁰
90⁰ = 45x⁰
2⁰ = x