Question

Help me with this Thanks!

Answer 1

`\bold \red{answer}`

(49+11)+(-30)=49+{11+30}

Step by step

(49+11)+(-30)=49+{11+___}

(49+11)+(-30)=49+{11+x}

49+11−30=49+11+x

49+11+−30=49+11+x

(49+11+−30)=(x)+(49+11)

30=x+60

30=x+60

x+60=30

x+60−60=30−60

x=−30