Question

Please solve card 6!

Answer 1

x+x+30=90
2x+30=90
2x=90-30
2x=60
x=60/2
x=30

Answer 2

×=30⁰ :)

Explanation:

x⁰+(x+30⁰)= 90⁰

x⁰+x⁰= 90⁰-30⁰=60⁰

2x⁰=60⁰

60⁰÷2=30⁰ => x⁰=30⁰

verification:

30⁰+(30⁰+30⁰)=90⁰