a) \(x+\left[58+\left(-29\right)\right]=\left|-46\right|\)
\(\Rightarrow x+\left(58-29\right)=46\)
\(\Rightarrow x+29=46\)
\(\Rightarrow x=46-29\)
\(\Rightarrow x=17\)
b) \(36+\left(100-5x\right):4=51\)
\(\Rightarrow\left(100-5x\right):4=51-36\)
\(\Rightarrow\left(100-5x\right):4=15\)
\(\Rightarrow100-5x=15\cdot4\)
\(\Rightarrow100-5x=60\)
\(\Rightarrow5x=100-60\)
\(\Rightarrow5x=40\)
\(\Rightarrow x=40:5\)
\(\Rightarrow x=8\)
\(\text{#}Toru\)
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